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Chinese Journal of Rehabilitation Theory and Practice ; (12): 21-28, 2024.
Article in Chinese | WPRIM | ID: wpr-1013280


ObjectiveTo investigate the effect of multi-target transcranial direct current stimulation (tDCS) and single-target tDCS on the performance of working memory-postural control dual-task in healthy adults, and to compare the regulatory effect of the two stimulation protocols. MethodsFrom November, 2020 to February, 2021, 19 healthy adults in Shanghai University of Sport were recruited and randomly accepted multi-target tDCS, single-target tDCS and sham stimulation with at least one week interval between any two stimulation protocols. The target areas of multi-target tDCS included left dorsal lateral prefrontal cortex (L-DLPFC) and bilateral primary motor cortex (M1), and single-tDCS only applied to L-DLPFC. Before and after stimulation, participants completed walking and standing balance tests under single task and dual-task conditions with the second task being a N-back task. The dual-task postural control performance, dual-task cost (DTC) and working memory performance were observed before and after stimulation. ResultsSignificant differences were observed among three stimulation protocols in the changes of stride variability (F = 3.792, P = 0.029), DTC of stride variability (F = 3.412, P = 0.040) and velocity of center of pressure (Vcop) (F = 3.815, P = 0.029). The stride variability (P = 0.047) and Vcop (P = 0.015) were significantly lower and the decrease in DTC of stride variability tended to be significant (P = 0.073) following multi-target tDCS, as compared to sham stimulation. Single-target tDCS significantly decreased the changes of stride variability (P = 0.011), DTC of stride variability (P = 0.014) and Vcop (P = 0.025), as compared to sham stimulation. Compared with single target tDCS, multi-target tDCS reduced the changes of the dual-task cost of the area of center of pressure (P = 0.035). Moreover, no significant difference was observed among the three stimulation protocols in the changes of each measure in the working memory test (P > 0.05). ConclusionBoth multi-target tDCS and single-target tDCS can improve the performance of working memory-postural control dual-task in healthy adults, and compared with single-target tDCS, multi-target tDCS has some advantages in regulating postural control.

Neuroscience Bulletin ; (6): 79-89, 2024.
Article in English | WPRIM | ID: wpr-1010684


Sensory conflict impacts postural control, yet its effect on cortico-muscular interaction remains underexplored. We aimed to investigate sensory conflict's influence on the cortico-muscular network and postural stability. We used a rotating platform and virtual reality to present subjects with congruent and incongruent sensory input, recorded EEG (electroencephalogram) and EMG (electromyogram) data, and constructed a directed connectivity network. The results suggest that, compared to sensory congruence, during sensory conflict: (1) connectivity among the sensorimotor, visual, and posterior parietal cortex generally decreases, (2) cortical control over the muscles is weakened, (3) feedback from muscles to the cortex is strengthened, and (4) the range of body sway increases and its complexity decreases. These results underline the intricate effects of sensory conflict on cortico-muscular networks. During the sensory conflict, the brain adaptively decreases the integration of conflicting information. Without this integrated information, cortical control over muscles may be lessened, whereas the muscle feedback may be enhanced in compensation.

Humans , Muscle, Skeletal , Electromyography/methods , Electroencephalography/methods , Brain , Brain Mapping
Chinese Journal of Physical Medicine and Rehabilitation ; (12): 210-215, 2023.
Article in Chinese | WPRIM | ID: wpr-995191


Objective:To observe any effect of dynamic motor instability training on the balance and postural control of stroke survivors.Methods:Forty stroke survivors with poor balance were randomly divided into a control group and an observation group, each of 20. In addition to routine rehabilitation, the observation group was given 20 minutes of dynamic motor instability training, 5 days a week for 8 weeks, while the control group underwent routine rehabilitation for the same length of time. Before and after the intervention, surface electromyogram of the rectus femoris, biceps femoris, and erector spinae were recorded during perturbation. Activation time and the intensity of the anticipatory and complementary postural adjustments (APAs and CPAs) were also observed. Balance and lower limb motor functioning were assessed using the Berg balance scale (BBS), the Fugl-Meyer lower extremity assessment (FMA-LE), and GaitWatch analysis.Results:After the treatment the average activation time of the rectus femoris, biceps femoris in the affected side and those of the biceps femoris [(-84.31±5.74)s] and erector spinae in the intact side in APAs were all significantly shorter in the observation group than in the control group, while the average activation intensity of the rectus femoris and erector spinae was significantly greater. There was no significant difference in the activation intensity of each muscle group in CPAs after the treatment. After the intervention the average BBS score, FMA-LE score, stride length and walking speed of the observation group all were significantly better than the control group′s averages.Conclusions:Supplementing traditional rehabilitation training with dynamic motor instability training can further improve the posture control of stroke survivors and promote recovery of their balance and walking ability.

Malaysian Orthopaedic Journal ; : 133-141, 2023.
Article in English | WPRIM | ID: wpr-1005892


@#Introduction: Harvesting peroneus longus for ACL reconstruction is thought to create ankle instability which could add to postural instability from an ACL injury. This apprehension prevents its use as a graft of primary choice for many surgeons. To date, there is no evidence available describing changes in postural control after its use in ACL reconstruction. The purpose of the study was to analyse the changes in postural control in the form of static and dynamic body balance after ACL reconstruction with Peroneus Longus Tendon Graft and compare it with the unaffected limb at different time intervals. Materials and methods: Thirty-one participants with ACL injury were selected and subjected to an assessment of static and dynamic balance before and after ACL reconstruction using the HUMAC balance system. Outcome measures for Centre of Pressure (COP) assessment were average velocity, path length, stability score, and time on target. Comparison of scores was done pre-operatively as well as at three- and six-months post-reconstruction with Peroneus longus tendon graft. Results: Static balance of the affected limb showed significant improvement with a decrease in average velocity (F=4.522, p=0.026), path length (F=4.592: p=0.024) and improvement of stability score (F=8.283, p=0.001). Dynamic balance measured by the time on the target variable also showed significant improvement at six-month follow-up (F=10.497: p=0.000). There was no significant difference between the affected and non-affected limb when compared at the different time intervals. Conclusion: The static and dynamic balance, which is impaired after ACL injury, improves with ACL reconstruction with PLT autologous graft. Hence PLTG can be safely used as a graft for ACL reconstruction without affecting postural control and body balance.

Audiol., Commun. res ; 28: e2575, 2023. tab, graf
Article in Portuguese | LILACS | ID: biblio-1420263


RESUMO Objetivo Avaliar o controle postural na doença de Menière. Métodos 34 pacientes com doença de Menière definida (grupo experimental) e 34 indivíduos hígidos (grupo controle), homogêneos quanto à idade e ao gênero, foram submetidos à posturografia do Tetrax Interactive Balance System (Tetrax IBS TM) em oito condições sensoriais. Índice de estabilidade, índice de distribuição de peso, índice de sincronização da oscilação postural direita/esquerda e dedos/calcanhar, frequência de oscilação postural e índice de risco de queda foram analisados. Resultados O índice de estabilidade foi maior no grupo experimental, com diferença significativa entre os grupos, em todas as condições sensoriais testadas. O risco de queda foi maior no grupo experimental do que no grupo controle. A oscilação postural foi maior no grupo experimental em todas as faixas de frequência, com diferença significativa em algumas delas. Não houve diferença significativa entre os grupos nos índices de distribuição de peso e de sincronização, nas oito condições sensoriais avaliadas. Conclusão Pacientes com doença de Menière apresentam comprometimento do controle postural, caracterizado por alterações do índice de estabilidade, em frequências de oscilação postural e no índice de risco de queda.

ABSTRACT Purpose To evaluate postural control in Menière's disease. Methods 34 patients with Menière's disease (experimental group) and 34 healthy individuals (control group) were submitted to Tetrax Interactive Balance System posturography under eight sensory conditions. Stability, weight distribution, synchronization, risk of falling and postural oscillation frequency were analyzed. Results Stability index was higher in the experimental group with significant difference between the groups in all sensory conditions. Risk of falling was higher in the experimental group than in the control. Postural oscillation was higher in the experimental group in all frequency ranges, with significant difference in some of them. There was no significant difference between the groups in the weight distribution and synchronization indexes. Conclusion In this study, Menière's disease patients presented impaired postural control, characterized by postural instability and oscillation and risk of falling.

Humans , Male , Female , Adult , Middle Aged , Aged , Vestibular Function Tests/methods , Sensation Disorders , Postural Balance , Posturology , Meniere Disease
Chinese Journal of Rehabilitation Theory and Practice ; (12): 590-594, 2023.
Article in Chinese | WPRIM | ID: wpr-975145


ObjectiveTo investigate the individual factors of postural adjustment reaction time and movement time during adaptive equilibrium. MethodsFrom March to December, 2021, 126 healthy adults aged 18 to 80 years were recruited at the First Medical Center of the General Hospital of the Chinese PLA. The DE-A somatosensory balance detection system was used to detect their postural adjustment reaction time (RT) and movement time (MT) as the platform tilting in multiple directions during standing (static) or walking (dynamic). The ages, genders, body mass index (BMI) and physical activity level of them were investigated. ResultsThe age was the only factor independently associated with dynamic RT and MT in all the directions (β > 0.632, P < 0.05). For static MT, as the platform tilting forward, physical activity level (β = -0.143, P < 0.05), BMI (β = 0.154, P < 0.05) and age (β = 0.663, P < 0.05) were the independently associated factors; as the platform tilting leftward, gender (β = -0.173, P < 0.05) and age (β = 0.647, P < 0.05) were the independently associated factors; and age was the only independently associated factor for other directions (β > 0.571, P < 0.05). For the static RT, age was the only independently associated factor for all the directions (β > 0.615, P < 0.05). ConclusionAge is the most important independently factor related to postural adjustment during adaptive equilibrium, and aging may delay the postural adjustment after instability.

Braz. j. otorhinolaryngol. (Impr.) ; 88(6): 841-849, Nov.-Dec. 2022. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1420792


Abstract Introduction: Many static postural tasks requiring vestibular contributions are completed while dual- tasking. Objective: We investigated the influence of dual-tasks on sensory integration for postural control and cognitive performance during the sensory organization test and examined the relationship between cognitive function and dual-task cost during the sensory organization test. Methods: Twenty adults completed single and dual-task versions of the six conditions of the sensory organization test were completed during two visits separated by one week. A subset of 13 participants completed three National Institute of Health (NIH)-toolbox cognitive tests including the Flanker inhibitory control and attention test, dimensional change card sort test and pattern comparison processing speed test. Wilcoxon signed rank tests were used to compare postural sway during single and dual-task sensory organization test. Friedman's test, with pairwise comparison post-hoc tests, was used to compare single task serial subtraction performance to the 6 dual-task sensory organization test conditions. Spearman's correlation coefficients were used to assess the relationship between cognitive performance on NIH-toolbox test and postural and cognitive dual-task cost during the sensory organization test. Results: Performing a cognitive dual-task during the sensory organization test resulted in a significant increase in postural sway during condition 1 (Z = −3.26, p = 0.001, ES = 0.73), condition 3 (Z = −2.53, p = 0.012, ES = 0.56), and condition 6 (Z = −2.02, p = 0.044, ES = 0.45). Subtraction performance significantly decreased in during condition 6 (Z = −2.479, p = 0.011, ES = 0.55) compared to single-task. The dimensional change card sort test demonstrated moderate correlations with dual-task cost of serial subtraction performance in condition 5 (dimensional change card sort test: r = −0.62, p = 0.02) and condition 6 (dimensional change card sort test: r= −0.56, p = 0.04). Pattern comparison processing speed test scores were significantly correlated with dual-task cost of postural control during condition 2. Conclusion: Performing a cognitive task during the sensory organization test resulted in significantly increased postural sway during three conditions, particularly during visual environment manipulation oppose to vestibular and somatosensory manipulation. Cognitive performance decreased during the most complex sensory organization test condition. Additionally, we found participants with poorer executive function had greater dual-task cost during more complex sensory integration demands.

Resumo Introdução: Muitas tarefas posturais estáticas que requerem contribuições vestibulares são feitas durante a dupla tarefa. Objetivo: Investigamos a influência da dupla tarefa na integração sensorial para o controle postural e desempenho cognitivo durante o teste de organização sensorial e examinamos a relação entre a função cognitiva e o custo da dupla tarefa durante o teste de organização sensorial. Método: Vinte adultos completaram versões da tarefa única e dupla tarefa das seis condições do teste de organização sensorial, que foram concluídas em duas consultas com um intervalo de uma semana. Um subgrupo de 13 participantes completou três testes cognitivos do NIH-toolbox, inclusive o flanker inhibitory control and attention test, dimensional change card sort test e o pattern comparison processing speed test .O teste de postos sinalizados de Wilcoxon foi usado para comparar a oscilação postural durante o teste de organização sensorial de tarefa única e dupla. O teste de Friedman, com testes post hoc de comparação pareada, foi usado para comparar o desempenho da subtração em série de tarefa única para as 6 condições do teste de organização sensorial de dupla tarefa. Os coeficientes de correlação de Spearman foram usados para avaliar a relação entre o desempenho cognitivo no teste NIH-toolbox e o custo da dupla tarefa postural e cognitivo durante o teste de organização sensorial. Resultados: A feitura de uma dupla tarefa cognitiva durante o teste de organização sensorial resultou em um aumento significativo na oscilação postural durante a condição 1 (Z = -3,26, p = 0,001, TE = 0,73), condição 3 (Z = -2,53, p = 0,012, TE = 0,56) e condição 6 (Z = -2,02, p = 0,044, TE = 0,45). O desempenho de subtração diminuiu significativamente durante a condição 6 (Z =-2,479, p = 0,011, TE = 0,55) em comparação com a tarefa única. O dimensional change card sort test demonstrou correlações moderadas com o custo da dupla tarefa de desempenho de subtração em série na condição 5 (dimensional change card sort test: r=-0,62, p = 0,02) e condição 6 (dimensional change card sort test: r = -0,56, p = 0,04). Os escores do pattern comparison processing speed test foram significativamente correlacionados com o custo da dupla tarefa do controle postural durante a condição 2. Conclusão: A feitura de uma tarefa cognitiva durante o teste de organização sensorial resultou em um aumento significativo na oscilação postural em três condições, principalmente durante a manipulação do ambiente visual em oposição à manipulação vestibular e somatossensorial. O desempenho cognitivo diminuiu durante a condição de teste de organização sensorial mais complexa. Além disso, observamos que os participantes com função executiva pior apresentaram maior custo da dupla tarefa durante demandas de integração sensorial mais complexas.

Fisioter. Pesqui. (Online) ; 29(3): 311-326, jul.-set. 2022. tab, graf
Article in Portuguese | LILACS-Express | LILACS | ID: biblio-1421486


RESUMO Após o acidente vascular cerebral (AVC), as pessoas apresentam combinações complexas de déficits sensoriais, motores, cognitivos e emocionais que podem afetar o equilíbrio estático e dinâmico. O objetivo do estudo foi compilar e resumir as principais características e achados de protocolos utilizados em pesquisas que investigaram os efeitos da vibração no tendão muscular no equilíbrio estático e dinâmico em adultos com AVC. Trata-se de uma revisão sistemática, registrada na PROSPERO (CRD42022303874), em que foram realizadas buscas nas bases de dados PubMed, Cochrane, LILACS, SciELO, MEDLINE, Science Direct e PEDro, durante o mês de janeiro de 2022, por meio da combinação de palavras-chave relacionadas a "stroke", "balance", "muscle tendon vibration" e "randomized controlled trial". A qualidade metodológica foi avaliada através da escala PEDro. Foram identificados 1.560 estudos, dos quais 11 foram incluídos, publicados entre 1994 e 2020, envolvendo 242 adultos pós-AVC. Apenas cinco estudos utilizaram a vibração como intervenção e verificaram melhora no equilíbrio estático e dinâmico. Seis estudos analisaram a interferência da vibração no controle postural, observando que o equilíbrio foi afetado durante a aplicação da vibração e que os indivíduos precisaram de mais tempo para se recuperar ou não sofreram diferenças significativas. Verificou-se que os efeitos da vibração do tendão muscular podem melhorar o equilíbrio em pessoas com AVC e influenciar o controle postural através de mecanismos proprioceptivos da vibração. Entretanto, são necessários mais estudos de alta qualidade metodológica para atingir um consenso em relação aos protocolos de tratamento com vibração do tendão muscular e sua recomendação na prática clínica.

RESUMEN Después del accidente cerebrovascular, las personas tienen combinaciones complejas de déficits sensoriales, motores, cognitivos y emocionales que pueden afectar el equilibrio estático y dinámico. El objetivo de este estudio fue recopilar y resumir las principales características y hallazgos de los protocolos utilizados en los estudios que investigaron los efectos de la vibración del tendón muscular sobre el equilibrio estático y dinámico en adultos con accidente cerebrovascular. Se trata de una revisión sistemática, registrada en PROSPERO (CRD420223874), en la que se realizaron búsquedas en las Bases de Datos PubMed, Cochrane, LILACS, SciELO, MEDLINE, Science Direct y PEDro, durante el mes de enero de 2022, mediante la combinación de palabras clave relacionadas con "stroke", "balance", "muscle tendon vibration" y "randomized controlled trial". La calidad metodológica se evaluó mediante la escala PEDro. Se identificaron un total de 1.560 estudios, de los cuales se incluyeron 11, publicados entre 1994 y 2020, con 242 adultos después del accidente cerebrovascular. Solo cinco estudios utilizaron la vibración como intervención y verificaron la mejoría en el equilibrio estático y dinámico. Seis estudios analizaron la interferencia de la vibración en el control postural, señalando que el equilibrio se vio afectado durante la aplicación de la vibración y que los individuos necesitaron más tiempo para recuperarse o no sufrieron diferencias significativas. Se encontró que los efectos de la vibración del tendón muscular pueden mejorar el equilibrio en personas con accidente cerebrovascular e influir en el control postural a través de mecanismos propioceptivos de vibración. Sin embargo, se necesitan más estudios de alta calidad metodológica para llegar a un consenso con respecto a los protocolos de tratamiento con vibración del tendón muscular y su recomendación en la práctica clínica.

ABSTRACT After cerebrovascular accident (CVA), people have complex combinations of sensory, motor, cognitive, and emotional deficits, which can affect static and dynamic balance. This study aimed to compile and summarize the main features and findings of protocols used in research that investigated the effects of muscle tendon vibration on static and dynamic balance in adults with stroke. This is a systematic review, registered in PROSPERO (CRD42022303874), in which searches were performed in the databases PubMed, Cochrane, LILACS, SciELO, MEDLINE, Science Direct, and PEDro, during the month of January 2022, using the combination of keywords related to "stroke," "balance," "muscle tendon vibration," "randomized controlled trial." Methodological quality was assessed using the PEDro scale. A total of 1,560 studies were identified, 11 of which were included, between the years 1994 to 2020, involving 242 post-stroke adults. Only five studies used vibration as an intervention and found an improvement in static and dynamic balance. Six studies analyzed the interference of vibration on postural control, showing that balance was affected during the application of vibration and that individuals needed more time to recover or did not experience significant differences. We found that the effects of muscle tendon vibration may be able to improve balance in people with stroke and influence postural control by proprioceptive mechanisms of vibration. However, more studies of high methodological quality are needed to reach a consensus regarding muscle tendon vibration treatment protocols and their recommendation in clinical practice.

Rev. otorrinolaringol. cir. cabeza cuello ; 82(1): 50-59, mar. 2022. ilus, tab, graf
Article in Spanish | LILACS | ID: biblio-1389830


Resumen Introducción: El vértigo posicional paroxístico benigno (VPPB) es la afección periférica más común en las enfermedades otoneurológicas. Con el reposicionamiento de partículas se busca eliminar el vértigo y sus síntomas asociados como lo son el mareo residual y la inestabilidad. Objetivo: Determinar si la maniobra de reposicionamiento de Epley (MRE) produce una modificación significativa del control postural (CP) en aquellos pacientes con VPPB de canal semicircular posterior (VPPB-CSC-P). Material y Método: Se realizó un estudio descriptivo prospectivo en una muestra de 21 pacientes con diagnóstico de VPPB-CSC-P. Comparamos el desplazamiento, la velocidad y el área del centro de presión (CoP) antes y después de la MRE. Resultados: La velocidad y el área de la CoP estudiada por posturografía computarizada muestra una disminución significativa en sus valores después de la MRE, mientras que el desplazamiento de la CoP se mantuvo sin cambios. Conclusión: La MRE ejecutada en pacientes con VPPB-CSC-P produce una modulación en el control de la CoP, demostrada por la disminución de la velocidad y el área de desplazamiento de la CoP. El éxito de la MRE produce modulación del CP.

Abstract Introduction: Benign paroxysmal positional vertigo (BPPV) is the most common peripheral condition in otoneurologic diseases. With the repositioning of particles, the aim is to eliminate vertigo and its associated symptoms, such as residual dizziness and instability. Aim: To determine if the Epley repositioning maneuver (ERM) produces a significant modification of postural control (PC) in those patients with posterior semicircular canal BPPV (BPPV-CSC-P). Material and Method: A prospective descriptive study was carried out in a sample of 21 patients diagnosed with BPPV-CSC-P. We compared the displacement, velocity, and area of the center of pressure (CoP) before and after the Epley repositioning maneuver. Results: The velocity and the area of the CoP studied by computed posturography show a significant decrease in its values after the MRE, while the CoP shift remained unchanged. Conclusion: ERM performed in patients with BPPV-CSC-P produces an improvement in the control of the CoP, demonstrated by the decrease in the speed and the area of movement of the CoP. The success of the MRE produces modulation of the PC.

Humans , Male , Female , Adult , Middle Aged , Aged , Aged, 80 and over , Semicircular Canals , Physical Therapy Modalities , Patient Positioning/methods , Benign Paroxysmal Positional Vertigo/therapy , Epidemiology, Descriptive , Prospective Studies
Chinese Journal of Rehabilitation Theory and Practice ; (12): 373-378, 2022.
Article in Chinese | WPRIM | ID: wpr-923545


@#Objective To explore the impacts of proprioception, cutaneous sensitivity and strength on dynamic and static postural stability.Methods From June to November, 2020, a total of 164 elderly participated in this study. Independent parameters included proprioception of knee flexion/extension and ankle dorsi/plantar flexion with proprioception measurement; the cutaneous sensitivity of great toe, first and fifth metatarsals, arch, and heel with monofilament; and strength of ankle dorsi/plantar flexion and hip abduction with isokinetic test. The Berg Balance Scale (BBS) and center of pressure (COP)-based postural stability tests were conducted to represent dynamic and static postural stability. Exploratory factor and multivariable linear regression analyses were used to explore the relationship of each generated factor to postural stability outcomes.Results Proprioception was significantly correlated to the score of BBS (r=-0.449, P<0.001) and the root mean square (RMS) of COP in mediolateral direction (r=0.254, P=0.004). Cutaneous sensitivity was significantly correlated to the RMS of COP in the anteroposterior direction (r=0.281, P=0.002). Strength was significantly correlated to the score of BBS (r=0.493, P<0.001).Conclusion Proprioception and strength are related to dynamic postural stability, while proprioception and cutaneous sensitivity are associated with static postural stability.

Journal of Medical Biomechanics ; (6): E531-E537, 2022.
Article in Chinese | WPRIM | ID: wpr-961762


Objective To compare the effects of hip abductor fatigue on postural stability and neuromuscular control in different gender groups during single-leg side-jump landing. Methods Twenty male and twenty female adults were required to execute single-leg side-jump landing before and after hip abductor fatigue protocol. The center of pressure (COP), ground reaction force (GRF), lower extremity kinematics, joint moment, muscle activity were compared. Results For both males and females after fatigue, the maximum displacements and average velocities of COP decreased, and the peak angles of hip abduction and ankle eversion increased, and the peak torques of ankle inversion increased. At 200 ms pre-landing, the activiation of rectus femoris, biceps femoris, tibialis anterior, peroneus longus were lower in male than that in female. At 200 ms post-landing, the activiation of biceps femoris in male was lower than that in female after fatigue. Conclusions The postural stability in frontal plane decreased after hip abductor fatigue. The frontal plane control of hip joint and ankle joint was weakened, which might increase the risk of joint injury. There are differences in postural strategies for different genders, indicating that gender difference in the mechanism of lower limb joint injury is worth of further investigation.

Motriz (Online) ; 28: e10220015421, 2022. tab, graf
Article in English | LILACS | ID: biblio-1386367


Abstract Aim: To investigate postural control between active (AOA) and inactive (IOA) older adults and active young adults (YA) due to the difficulty level of the postural task. Methods: 25 active YA, 31 AOA, and 30 IOA were invited to perform postural tasks with eyes open and closed: bipedal stance on a rigid surface, bipedal stance on an unstable surface, semi-tandem stance on a rigid surface, and semi-tandem stance on an unstable surface. Results: IOA (0.74 cm) presented higher COP displacement amplitude in the mediolateral direction than AOA (0.64 cm) only in bipedal stance on an unstable surface with eyes closed condition (p ≤ 0.0001). In relation to frequency variables, IOA (0.37 Hz) presented a greater frequency band with 50% of the spectral power in the mediolateral direction than AOA (0.28 Hz) in all experimental conditions, except for semi-tandem stance on a rigid surface (p ≤ .0001). AOA (0.62 cm - 0.28 Hz) and IOA (0.67 cm - 0.37 Hz) presented an increase in time/frequency variables in both directions (anterior-posterior and mediolateral) than YA (0.52 cm - 0.17 Hz) (p ≤ 0.0001) that indicates a worse performance of postural control as the level of task difficulty increased, such as unstable base with eyes open and closed. Conclusion: Older adults tend to present greater COP sway and velocity when subjected to complex tasks compared with younger, which is more evident in older adults physically inactive. This could be considered an adaptive strategy by older adults to minimize the risk of losing balance and, consequently, falling.

Humans , Aged , Aged, 80 and over , Aging , Exercise , Postural Balance , Data Collection , Surveys and Questionnaires , Data Interpretation, Statistical
Motriz (Online) ; 28: e10220010821, 2022. tab, graf
Article in English | LILACS | ID: biblio-1394478


Abstract Aim: To assess the postural control performance of football 5-a-side (FFS) players, comparing them with sighted players. Methods: Eight FFS players and 7 sighted futsal players were included. Postural control tests included feet together stance (FTS) and single-leg stance (SLS) tasks, performed on rigid and foam surfaces. Sighted players performed the tests with open (EO) and closed (EC) eyes. Area of displacement (Area) and average velocity (Vavg) were calculated from the center of pressure time-series coordinates. Results: On both surfaces conditions, a significant difference between visually impaired football 5-a-side players and sighted EO players was observed during FTS (higher Vavg for visually impaired football 5-a-side players; p < 0.04) and SLS (higher Area and Vavg for visually impaired football 5-a-side players; p < 0.01). No differences between visually impaired football 5-a-side players and sighted EC players were found. Differences between sighted EO vs. sighted EC were observed during FTS on the foam surface, and in SLS on both surface conditions (p < 0.03). Conclusion: FFS players' postural control performance is similar to sighted players with EC but worse than sighted players with EO, suggesting their postural control performance can be simply explained in terms of visual restriction.

Humans , Soccer , Visually Impaired Persons , Postural Balance , Sports for Persons with Disabilities , Cross-Sectional Studies/instrumentation , Athletic Performance , Observational Study
Rev. Investig. Innov. Cienc. Salud ; 4(2): 34-49, 2022. ilus, tab
Article in Spanish | LILACS, COLNAL | ID: biblio-1418895


Introducción: El deporte paralímpico se originó como parte de procesos de re-habilitación para personas que tuvieran discapacidad. Durante la ejecución de las disciplinas paralímpicas el control motor en la región del tronco y en especial del abdomen es de gran importancia para prevenir lesiones y mejorar el registro de la marca deportiva. Son muchas las herramientas utilizadas por los entrenadores de-portivos para mejorar la fuerza muscular y por consiguiente la estabilidad de tronco, buscando disminuir el riesgo en el ámbito deportivo. Sin embargo, las investigaciones sobre el uso de realidad virtual, junto con plataformas de estabilometría para el en-trenamiento de deportistas paralímpicos con lesiones físicas, son escasas.Objetivo: Establecer el efecto de un programa de entrenamiento del tronco apoya-do en realidad virtual en deportistas de alto rendimiento paralímpicos, lanzadores de bala y jabalina con lesiones físicas y que compiten en sillas de lanzamiento. Materiales y método: La investigación fue diseñada como un estudio cuasiex-perimental intrasujeto. Se evaluaron cinco sujetos deportistas paralímpicos de alto rendimiento con discapacidad física. Se empleó un software de realidad virtual que incluye patrones y juegos lúdicos ajustables en tiempo e intensidad y una platafor-ma de bipedestación dinámico como parte del equipo de intervención, ajustable al paciente, que permite reeducar el equilibrio, la propiocepción, fortalecer y lograr el control del tronco. Las variables de análisis fueron el nivel del desplazamiento ante-roposterior y lateral del tronco y los cambios en el volumen de acción. Se realizó una evaluación inicial, una intervención que duró de seis semanas y la evaluación final. Resultados: En las evaluaciones iniciales de todos los atletas se observó una ten-dencia al desplazamiento en sentido posterior. En la evaluación final, los rangos de desplazamiento aumentan en casi todos los sujetos con excepción del sujeto 5, cuyos valores permanecen casi estables tanto en las evaluaciones iniciales como las finales. La diferencia en el desplazamiento entre la prueba inicial y final en promedio de los participantes fue de 6.26 grados. Conclusiones: los resultados positivos del entrenamiento del tronco apoyado en realidad virtual para los participantes constituyen un aporte al conocimiento sobre el tema y abren la posibilidad de incluir esta tecnología en protocolos de entrenamiento en deporte paralímpico.

Introduction: Paralympic sport originated as part of rehabilitation processes for people with disabilities. During the execution of Paralympic disciplines, motor con-trol in the trunk region and especially in the abdomen is of great importance to prevent injuries and improve the registration of the sports record. There are many tools used by sports coaches to improve muscle strength and therefore trunk stability to reduce the risk in the sports field. However, research on the use of virtual reality along with stabilometry platforms for the training of Paralympic athletes with phys-ical injuries are scarce.Objective: To establish the effect of a trunk training program supported by virtual reality in high performance Paralympic athletes, shot put and javelin throwers with physical injuries who compete in throwing frames. Materials and method: The research was designed as an intrasubject quasi-ex-perimental study. Five high-performance Paralympic athletes with physical disabili-ties were evaluated. A virtual reality software that includes patterns and playful games adjustable in time and intensity and a dynamic standing platform were used as part of the intervention equipment, adjustable to the patient, which allows reeducating balance, proprioception, strengthening, and achieving trunk control. The variables of analysis were the level of anteroposterior and lateral displacement of the trunk and changes in the volume of action. An initial evaluation, an intervention that lasted six weeks, and a final evaluation were carried out. Results: In the initial evaluations of all athletes, a tendency towards posterior dis-placement was observed. In the final evaluation, the displacement ranges increase in almost all subjects except for subject 5, which showed values that remain almost sta-ble in both the initial and final evaluations. The difference in displacement between the initial and final test on average of the participants was 6.26 degrees. Conclusions: the positive results of trunk training supported by virtual reality for the participants constitute a contribution to the knowledge on the subject and open the possibility of including this technology in training protocols in Paralympic sports.

Virtual Reality , Exergaming , Core Stability , Play and Playthings , Rehabilitation , Sports , Muscle Strength , Athletes , Standing Position , Para-Athletes
RFO UPF ; 26(2): 221-227, 20210808. tab
Article in Portuguese | LILACS, BBO | ID: biblio-1443778


Objetivo: a presente revisão almeja fornecer à prática clínico-odontológica e ao meio científico uma compreensão atualizada acerca da correlação entre as alterações posturais geradas pela presença de distúrbios respiratórios e as desordens temporomandibulares (DTMs). Revisão de literatura: foi realizada uma busca entre o período de 2005 a 2021 nas seguintes bases de dados: Medline (via PubMed), Portal de Periódicos Capes e Scopus, utilizando-se dos termos "temporomandibular joint; temporomandibular disorders; posture control; postural control; breathing". Como resultado, foram encontrados 4.384 documentos, que foram analisados por títulos, resumos, texto completo e critérios de elegibilidade, até se chegar ao total de 5 estudos a serem incluídos nesta revisão. Considerações finais: os principais fatores observados foram a associação das DTMs com condições como padrão de respiração do tipo bucal, postura anterior da cabeça, hiperatividade de músculos acessórios da respiração, rotação posterior da mandíbula e apneia obstrutiva do sono. Os estudos ressaltaram a necessidade da abordagem completa desses pacientes, visto que os papéis dos distúrbios respiratórios e das alterações posturais podem representar desafios no diagnóstico e no tratamento das DTMs.(AU)

Objective: this review aims to provide to the clinical dental practice and the scientific community an updated understanding of the correlation between postural changes generated by the presence of respiratory disorders and temporomandibular joint disorders (TMD). Literature review: a search was carried out covering the period from 2005 to 2021 in the following databases: Medline (via PubMed), Portal de Periódicos Capes and Scopus using the terms temporomandibular joint; temporomandibular disorders; posture control; postural control; breathing. As a result, 4,384 documents were obtained and shortlisted by title, abstracts, full text and eligibility criteria, resulting in the five studies included in this review. Final considerations: the main factors observed were the association of TMD with conditions as mouth breathing, anterior head posture, hyperactivity of accessory breathing muscles, posterior rotation of the jaw and obstructive sleep apnea. The studies underscored the need for a complete approach to these patients, given that the role of respiratory disorders and postural changes may represent a challenge in the diagnosis and treatment of TMD.(AU)

Humans , Respiration Disorders/physiopathology , Temporomandibular Joint Disorders/physiopathology , Postural Balance/physiology , Temporomandibular Joint/physiopathology , Respiratory Muscles/physiopathology
J. Hum. Growth Dev. (Impr.) ; 31(2): 199-208, May-Aug. 2021.
Article in English | LILACS, INDEXPSI | ID: biblio-1340079


INTRODUCTION: Electronic devices have been used by increasingly younger people, leading researchers to investigate the impact of these technologies on the health of developing childrenOBJECTIVE: To investigate the impact of smartphone use on the postural control of Brazilian children 6 to 9 years oldMETHODS: This cross-sectional study was conducted with 278 children from public schools in Goiânia (Goiás, Brazil). The children were assessed in an orthostatic posture with the computerized baropodometry system in three conditions: eyes open, eyes closed, and using a free smartphone applicationRESULTS: The children were 8.36 years old on average, 82% of them were well-nourished, and had a daily mean screen time of 2 hours. The postural control analyses revealed that the children made greater postural adjustments with their eyes closed than with them open. When using the smartphone application, the postural adjustments were similar to those with eyes closed. In the stabilometry, the postural displacements made by the children behaved similarly to the static assessment only in total feet surface areaCONCLUSION: Smartphone use and absence of visual stimulus in the orthostatic position caused postural instability in children 6 to 9 years old. These findings can contribute to understanding the impact of technologies on children's development of balance in daily tasks

INTRODUÇÃO: O uso de dispositivos eletrônicos móveis tem alcançado usuários cada vez mais jovens e tem levado pesquisadores a investigar o impacto dessas tecnologias na saúde da criança em desenvolvimentoOBJETIVO: Investigar o impacto do uso do smartphone no controle postural de crianças brasileiras de 6 a 9 anos de idadeMÉTODO: Estudo transversal realizado com 278 crianças de escolas públicas de Goiânia (GO, Brasil). As crianças foram avaliadas na postura ortostática pelo sistema de baropodometria computadorizada em três condições: olhos abertos, olhos fechados e manuseando um aplicativo gratuito para smartphoneRESULTADOS: As crianças tinham idade média de 8,36 anos, sendo 82% de eutróficas e com tempo médio de tela de duas horas diárias. As análises do controle postural revelaram que as crianças apresentaram maiores ajustes posturais com os olhos fechados em comparação com os olhos abertos e ao usar o aplicativo do smartphone o ajuste postural foi semelhante ao encontrado com olhos fechados. Na estabilometria, os deslocamentos posturais realizados pelas crianças se comportaram de modo semelhante à avaliação estática apenas na área total da superfície dos pésCONCLUSÃO: O uso do smartphone e a ausência do estímulo visual na posição ortostática promoveram instabilidade postural nas crianças de 6 a 9 anos de idade. Estes achados podem contribuir para o conhecimento do impacto de tecnologias no desenvolvimento do equilíbrio de crianças em atividades diárias

Humans , Male , Female , Child , Child Development , Child Health , Postural Balance , Cell Phone Use , Screen Time
Arq. neuropsiquiatr ; 79(5): 399-406, May 2021. tab, graf
Article in English | LILACS | ID: biblio-1278396


ABSTRACT Background: Migraine is one of the most frequent and incapacitating headaches, with a high degree of impairment of balance control and postural stability. Objective: To investigate the effects of episodic and chronic migraine on postural balance through using static and dynamic balance tests. Methods: The study included 32 chronic and 36 episodic migraine patients and a control group of 36 healthy volunteers. Right/left single-leg static and dynamic balance tests were performed in each group with eyes open and closed using a posturographic balance platform (Techno-body Prokin). Results: No significant difference was found among episodic and chronic migraine patients and control subjects with regard to eyes-open and eyes-closed area values (eyes-open area values: p=0.559, p=0.414 and p=0.906; eyes-closed area values: p=0.740, p=0.241 and p=0.093, respectively). However, the area values were significantly higher in episodic and chronic migraine patients than in the control group, which indicates that migraine patients may have lower balance performance. Perimeter values were relatively higher which supports the idea that migraine patients have lower balance performance. Additionally, the average number of laps was significantly lower among migraine patients than in the control group, which also implies that migraine patients may have lower balance performance. Conclusion: Although no significant difference was detected between chronic and episodic migraine patients and the control group and between chronic and episodic migraine patients with regard to balance performance, chronic migraine patients seemed to have relatively lower performance than episodic migraine patients. Further studies with larger numbers of patients are needed, to investigate the relationship between these parameters and balance.

RESUMO Introdução: A enxaqueca é uma das dores de cabeça mais frequentes e incapacitantes, com alto grau de comprometimento do controle do equilíbrio e estabilidade postural. Objetivo: Investigar os efeitos da enxaqueca episódica e crônica no equilíbrio postural por meio de testes de equilíbrio estático e dinâmico. Métodos: O estudo incluiu 32 pacientes com enxaqueca crônica e 36 com enxaqueca episódica e um grupo controle de 36 voluntários saudáveis. Os testes de equilíbrio estático e dinâmico unipodal direito/esquerdo foram realizados em cada grupo, com os olhos abertos e fechados, por meio de uma plataforma de equilíbrio posturográfico (Techno-body Prokin). Resultados: Nenhuma diferença significativa foi encontrada entre pacientes com enxaqueca episódica e crônica e indivíduos controle em relação aos valores da área de olhos abertos e olhos fechados (valores de área de olhos abertos: p=0,559, p=0,414 e p=0,906; valores de área de olhos fechados: p=0,740, p=0,241 e p=0,093, respectivamente). No entanto, os valores de área foram significativamente maiores em pacientes com enxaqueca episódica e crônica do que no grupo controle, o que indica que pacientes com enxaqueca podem ter desempenho de equilíbrio inferior. Os valores do perímetro foram relativamente mais altos, o que sustenta a hipótese de que os pacientes com enxaqueca apresentam desempenho de equilíbrio inferior. Além disso, o número médio de voltas foi significativamente menor entre os pacientes com enxaqueca do que no grupo controle, o que também implica que os pacientes com enxaqueca possam ter um desempenho de equilíbrio inferior. Conclusão: Embora nenhuma diferença significativa tenha sido detectada entre os pacientes com enxaqueca crônica e episódica e o grupo controle e entre os pacientes com enxaqueca crônica e episódica no que diz respeito ao desempenho do equilíbrio, os pacientes com enxaqueca crônica parecem ter um desempenho relativamente inferior do que os pacientes com enxaqueca episódica. Outros estudos com maior número de pacientes são necessários para investigar a relação entre esses parâmetros e o equilíbrio.

Humans , Postural Balance , Migraine Disorders , Lower Extremity , Healthy Volunteers
Journal of Medical Biomechanics ; (6): E957-E962, 2021.
Article in Chinese | WPRIM | ID: wpr-920710


Objective To explore the characteristics of short-term static balance of obese children by comparing the excursion of center of pressure (COP) in obese and non-obese children under six kinds of standing circumstances. Methods By using the Footscan balance plate system, parameters of COP excursion for 47 obese children and 50 non-obese children standing on both feet or single foot with eyes open or eyes closed for 10 seconds were obtained, respectively. Results The maximum COP displacement in anterior-posterior direction of obese children was significantly greater than that of non-obese children during standing on both feet with eyes closed. During standing on left foot with eyes open, the sway velocity of obese boys was significantly lower than that of non-obese boys; the maximum COP displacement in medial-lateral direction of obese boys was significantly lower than that of non-obese boys and the maximum displacement of COP in medial-lateral direction of obese girls was significantly greater than that of non-obese girls. The sway velocity of boys was significantly greater than that of girls during standing on left foot with eyes closed. Conclusions In short period of time, the static balance of obese children in anterior-posterior direction was worse than that of non-obese children during standing on both feet with eyes closed. Obesity had different impacts on static balance of different genders. The performance of static balance for obese boys was better than that of non-obese boys, while the performance of static balance for obese girls was worse than that of non-obese girls during standing on left foot with eyes open. Girls had a better static balance performance than boys during standing on left foot with eyes closed. There were no significant differences in static balance performance between boys and girls under the other circumstances. As static balance of children is affected by obesity and gender, it is suggested that different methods of losing weight should be considered for obese children of different genders.

Article | IMSEAR | ID: sea-205803


Background: The evaluation of balance measures can help identify postural control processes, but traditional data collection for the center of pressure (COP) may not reveal differences in postural control mechanisms. This study aimed to evaluate the reliability of the frequency component of postural sway using wavelet analysis of COP signals. Methods: Fifteen healthy male subjects (average age: 39.16±7.2 years, average weight: 72±11.06 kg, average height: 171±6.31 cm) participated in this project. They were requested to perform three trials of single-leg and tandem stance conditions for 20-second with and without vision on a force plate. The frequency content of COP signals, including the energy, root mean square (RMS), and velocity of the COP in four frequency bandwidths of postural sway, was evaluated. The test-retest reliability of COP parameters was tested using the intraclass correlation coefficient (ICC). Results: Among different COP parameters, the energy of the COP within a moderate (1.56–6.25 Hz) frequency band (.79≤ ICC ≤.97) with standard error measurement (SEM) ranged from .14 to .23, the RMS of COP within low (.39–1.56Hz) (.79≤ ICC ≤.93) and ultralow (< .10 Hz) (SEM ranged from .000 to .002) (.78≤ ICC ≤.94) in a tandem stance and the RMS of COP in a bandwidth of < .10 Hz (SEM=.00) in a single-leg stance (.70≤ ICC ≤.99) with the eyes closed and open showed good to excellent reliability. Conclusion: The results of this study showed moderate to excellent reliability of wavelet-based COP measures; therefore, these parameters can be used for the identification of postural control mechanisms.

Rev. bras. med. esporte ; 26(4): 323-327, Jul.-Aug. 2020. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1137912


ABSTRACT Introduction Numerous recovery strategies have been used to minimize performance loss related to delayed onset muscle soreness in athletes, and are part of prevention programs and training of most high-level sports. Objective To analyze the effects of cold-water immersion on delayed-onset muscle soreness, muscle recruitment, and postural control in soccer players. Objective The maximum load of the quadriceps femoris muscle strength was determined. After three days, the pain scale was used to measure the subject's pain intensity. The recruitment of the quadriceps muscle was determined at the moment of the kick, and was associated with postural control. Methods Randomized, blinded clinical trial study. Two repeated series of maximum load sets at 60% MVC, performed in a knee extension chair, were used to induce quadriceps fatigue in the athletes. Participants Twenty-eight soccer players were allocated to four intervention groups: cold water immersion (CWIG, n = 7), thermoneutral water immersion (TWIG, n = 7), active recovery (ARG, n = 7), and rest (RG, n = 7), with each intervention being carried out for ten minutes. Revaluations were carried out after 24, 48, and 72 hours of the fatigue protocol. Results Pain intensity in the CWIG returned to baseline after 72 hours, while the TWIG, ARG, and RG continued to feel greater pain. For the other outcomes, no differences were found between the groups. Conclusion With regard to muscle recruitment and postural control at the time of the kick, no significant differences were found for the time periods or intervention established. Level of evidence I; High-quality randomized clinical trial with or without statistically significant difference, but with narrow confidence intervals.

RESUMO Introdução Numerosas estratégias de recuperação têm sido usadas para minimizar a perda de desempenho decorrente de dor muscular de início tardio em atletas e fazem parte de programas de prevenção e treinamento da maioria dos esportes de alto nível. Objetivos Analisar os efeitos da imersão em água fria sobre a dor muscular tardia, o recrutamento muscular e o controle postural de jogadores de futebol. Métodos Estudo clínico randomizado e cego. Determinou-se a carga máxima da força muscular do quadríceps femoral. Depois de três dias, empregou-se a escala de dor para avaliar a intensidade da dor dos indivíduos. O recrutamento do quadríceps femoral foi determinado no momento do chute e associado ao controle postural. Duas séries repetidas de conjuntos de carga máxima a 60% da CVM, realizadas em uma cadeira extensora de joelho, foram usadas para induzir fadiga do quadríceps nos atletas. Vinte e oito jogadores de futebol foram randomizados em quatro grupos de intervenção: imersão em água fria (GIAF, n = 7), imersão em água termoneutra (GIAT, n = 7), recuperação ativa (GRA, n = 7) e repouso (GR, n = 7), sendo cada intervenção realizada por dez minutos. As reavaliações ocorreram depois de 24, 48 e 72 horas do protocolo de fadiga. Resultados A intensidade da dor no GIAF voltou para o valor basal após 72 horas, enquanto GIAT, GRA e GR continuaram a sentir dor acentuada. Não foram encontradas diferenças entre os grupos com relação aos outros desfechos. Conclusão Com relação ao recrutamento muscular e ao controle postural no momento do chute, não foram encontradas diferenças significativas para os períodos ou intervenções estabelecidas. Nível de evidência I; Estudo clínico randomizado de alta qualidade com ou sem diferença estatisticamente significante, mas com intervalos de confiança estreitos.

RESUMEN Introducción Se han utilizado numerosas estrategias de recuperación para minimizar la pérdida de rendimiento relacionada con el dolor muscular de aparición tardía en los atletas y son parte de programas de prevención y entrenamiento de la mayoría de los deportes de alto nivel. Objetivos Analizar los efectos de la inmersión en agua fría sobre el dolor muscular tardío, el reclutamiento muscular y el control postural en jugadores de fútbol. Métodos Estudio clínico aleatorizado y ciego. Se determinó la carga máxima de la fuerza muscular del cuádriceps femoral. Después de tres días, se usó la escala de dolor para evaluar la intensidad del dolor de los individuos. El reclutamiento del cuádriceps femoral se determinó en el momento de la patada y se asoció con el control postural. Se utilizaron dos series repetidas de conjuntos de carga máxima al 60% de la CVM en una silla de extensión de rodilla para inducir fatiga del cuádriceps en atletas. Veintiocho jugadores de fútbol fueron asignados al azar en cuatro grupos de intervención: inmersión en agua fría (GIAF, n = 7), inmersión en agua termoneutra (GIAT, n = 7), recuperación activa (RA, n = 7) y descanso (GD, n = 7), con cada intervención realizada durante diez minutos. Las reevaluaciones ocurrieron después de 24, 48 y 72 horas después del protocolo de fatiga. Las revaluaciones ocurrieron después de 24, 48 y 72 horas del protocolo de fatiga. Resultados La intensidad del dolor en el GIAF volvió a la línea de base después de 72 horas, mientras que GIAT, GRA y GD continuaron experimentando dolor intenso. No se encontraron diferencias entre los grupos con respecto a otros resultados. Conclusión Con respecto al reclutamiento muscular y el control postural en el momento de la patada, no se encontraron diferencias significativas para los períodos o la intervención establecida. Nivel de evidencia I; Ensayo clínico aleatorizado de alta calidad con o sin una diferencia estadísticamente significativa, pero con intervalos de confianza estrechos.