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ABSTRACT Pelvic floor muscle weakness can lead to urinary incontinence, pelvic organ prolapse, and sexual dysfunction. Although it can be minimized by pelvic floor muscle training (PFMT), its effects are not lasting. Therefore, using combination therapy seems promising. This study aims to evaluate the effect of transcranial direct current stimulation (tDCS) combined with PFMT on intravaginal pressure, pelvic floor muscle strength (PFMS), sexual function (SF), and quality of life (QoL) in healthy women. A total of 32 women, aged from 18 to 45 years, will undergo PFMT (with perineal contractions and relaxation) with the aid of pressure biofeedback associated with active tDCS or sham tDCS. Sessions will last 20 minutes, three times per week, for four weeks, totaling 12 sessions. During the protocol, participants will be instructed to also perform the home-based PFMT daily. The tDCS anodal electrode will be positioned over the supplementary motor area of the dominant cortical hemisphere, whereas the cathodal will be over the contralateral supraorbital region, with a 2mA intensity for 20 minutes. Intravaginal pressure (pressure gauge), PFM strength (measured by digital palpation and the PERFECT scheme), FSFI (Female Sexual Function Index), and QoL (SF-36 questionnaire) will be evaluated before and after the 12 sessions and after a 30-day follow-up.
RESUMEN La debilidad de la musculatura del suelo pélvico puede provocar incontinencia urinaria, prolapso de órganos pélvicos y disfunción sexual, y puede minimizarse mediante el entrenamiento de la musculatura del suelo pélvico (EMSP). Sin embargo, este efecto no es duradero. En este contexto, una terapia combinada puede ser prometedora para mejorar la situación. Este estudio tiene por objetivo evaluar el efecto de la estimulación transcraneal por corriente directa (ETCC) combinada con EMSP sobre la presión intravaginal, la fuerza muscular del suelo pélvico (FMSP), la función sexual (FS) y la calidad de vida (CV) en mujeres sanas. Participarán 32 mujeres, de entre 18 y 45 años, que se someterán a EMSP (contracciones y relajación del perineo) y a Biofeedback asociado a ETCC activa o ETCC sham durante 20 minutos, tres veces por semana, durante 4 semanas, con un total de 12 sesiones. Durante el protocolo, las participantes también se someterán diariamente a EMSP en casa. El electrodo anodal de la ETCC se colocará sobre el área motora suplementaria del hemisferio cortical dominante, y el electrodo catodal sobre la región supraorbital contralateral, a una intensidad de 2 mA, durante 20 minutos. Se evaluarán la presión intravaginal (manómetro), la FMSP (palpación digital, esquema Perfect), la FS (Índice de Función Sexual Femenina) y la CV (cuestionario SF-36) antes y después de las 12 sesiones, así como tras un seguimiento de 30 días.
RESUMO A fraqueza muscular do assoalho pélvico pode gerar incontinência urinária, prolapso de órgãos pélvicos e disfunção sexual, e pode ser minimizada pelo treinamento muscular do assoalho pélvico (TMAP). No entanto, este efeito não é duradouro. Assim, terapia combinada parece ser promissora para a melhora deste quadro. Dessa forma, objetiva-se avaliar o efeito da estimulação transcraniana por corrente contínua (ETCC), combinada ao TMAP, sobre a pressão intravaginal, força muscular do assoalho pélvico (FMAP), função sexual (FS) e qualidade de vida (QV) em mulheres saudáveis. Serão 32 mulheres, entre 18 e 45 anos, que realizaram TMAP (contrações e relaxamento do períneo) e Biofeedback associados a ETCC ativa ou ETCC sham por 20 minutos, três vezes por semana, por 4 semanas, totalizando 12 sessões. Durante o protocolo, as participantes também realizarão diariamente, em domicílio, o TMAP. O eletrodo anodal da ETCC será posicionado sobre a área motora suplementar do hemisfério cortical dominante, e o catodal sobre a região supraorbital contralateral, com intensidade de 2mA, por 20 minutos. A pressão intravaginal (manômetro de pressão), FMAP (palpação digital, esquema Perfect), FS (Índice de Função Sexual Feminina) e QV (questionário SF-36) foram avaliadas antes e depois das 12 sessões, bem como após acompanhamento de 30 dias.
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ObjectiveTo explore the effect of brain-computer interface (BCI) based on visual, auditory and motor feedback combined with transcranial direct current stimulation (tDCS) on upper limb function in stroke patients. MethodsFrom March to October, 2023, 45 stroke inpatients in Xuzhou Rehabilitation Hospital and Xuzhou Central Hospital were divided into BCI group (n = 15), tDCS group (n = 15) and combined group (n = 15) randomly. All the groups received routine rehabilitation, while BCI group received BCI training, tDCS group received tDCS, while the combined group received tDCS and followed by BCI training immediately, for four weeks. They were assessed with Fugl-Meyer Assessment-Upper Extremities (FMA-UE), Action Research Arm Test (ARAT), modified Barthel Index (MBI) and delta-alpha ratio (DAR) and power ratio index (PRI) of electroencephalogram before and after treatment. ResultsThe scores of FMA-UE, ARAT and MBI increased in all the groups after treatment (|t| > 5.350, P < 0.001), and all these indexes were the best in the combined group (F > 3.366, P < 0.05); while DAR and PRI decreased in all the groups (|t| > 2.208 , P < 0.05), they were the best in the combined group (F > 5.224, P < 0.01). ConclusionBCI based on visual, auditory and motor feedback combined with tDCS can further improve the motor function of upper limbs and the activities of daily living of stroke patients.
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ObjectiveTo evaluate the effect of transcranial direct current stimulation (tDCS) on the cognitive function and quality of life in patients with Parkinson's disease. MethodsRandomized controlled trials (RCTs) on tDCS for Parkinson's disease were searched in PubMed, Web of Science, Embase, Cochrane Library, CNKI, CBM, VIP and Wanfang Data from the inception to September, 2023. Control group was administered standard Parkinson's medications or placebo, physical therapy, and cognitive rehabilitation, while treatment group received tDCS additionally. The quality of the researches was evaluated using the Cochrane Risk of Bias Tool. Data synthesis and analysis were performed using RevMan 5.4 and Stata 17.0, with heterogeneity and sensitivity analyses. ResultsEight articles were included. tDCS significantly improved the scores of Montreal Cognitive Assessment (MD = 2.00, 95%CI 1.13 to 2.87, P < 0.001). However, there was no significant difference in the scores of Parkinson's Disease Questionnaire (MD = 0.73, 95%CI -5.78 to 7.23, P = 0.830), Beck Depression Inventory-Ⅱ(MD = -0.77, 95%CI -7.14 to 5.60, P = 0.810), and Unified Parkinson Disease Rating Scale-Ⅲ (MD = 1.60, 95%CI -0.77 to 3.97, P = 0.190). ConclusiontDCS may improve cognitive function of patients with Parkinson's disease.
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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.
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Objective: Transcranial direct current stimulation (tDCS) has mixed effects for major depressive disorder (MDD) symptoms, partially owing to large inter-experimental variability in tDCS protocols and their correlated induced electric fields (E-fields). We investigated whether the E-field strength of distinct tDCS parameters was associated with antidepressant effect. Methods: A meta-analysis was performed with placebo-controlled clinical trials of tDCS enrolling MDD patients. PubMed, EMBASE, and Web of Science were searched from inception to March 10, 2023. Effect sizes of tDCS protocols were correlated with E-field simulations (SimNIBS) of brain regions of interest (bilateral dorsolateral prefrontal cortex [DLPFC] and bilateral subgenual anterior cingulate cortex [sgACC]). Moderators of tDCS responses were also investigated. Results: A total of 20 studies were included (21 datasets, 1,008 patients), using 11 distinct tDCS protocols. Results revealed a moderate effect for MDD (g = 0.41, 95%CI 0.18-0.64), while cathode position and treatment strategy were found to be moderators of response. A negative association between effect size and tDCS-induced E-field magnitude was seen, with stronger E-fields in the right frontal and medial parts of the DLPFC (targeted by the cathode) leading to smaller effects. No association was found for the left DLPFC and the bilateral sgACC. An optimized tDCS protocol is proposed. Conclusions: Our results highlight the need for a standardized tDCS protocol in MDD clinical trials. Registration number: PROSPERO CRD42022296246.
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ABSTRACT BACKGROUND AND OBJECTIVES: Chronic Pelvic Pain (CPP) is characterized by persistent pain in the pelvic region for more than six months, affecting both men and women and causing significant impairment in quality of life (QoL). Two of the main non-invasive approaches are Transcranial Magnetic Stimulation (TMS) and Transcranial Direct Current Stimulation (tDCS). These techniques aim to modulate neural activity and promote pain relief. In this context, this research conducted an integrative literature review to summarize the results of relevant studies, aiming to identify the key parameters used in TMS and tDCS for CPP treatment. The objective was to assess the effect and efficacy of non-invasive neuromodulation as a therapeutic intervention for CPP. CONTENTS: For this integrative review, electronic searches were conducted in Pubmed, Scielo, PEDro, Medline, Cochrane, and Scopus databases, examining studies in Portuguese, English, or Spanish. The keywords "pelvic pain," "transcranial direct current stimulation," and "transcranial magnetic stimulation" and their derivatives were searched in the three languages in studies from 2013 to 2023. Seven studies were included for analysis. Both techniques showed positive effects in managing CPP, improving pain levels and quality of life to a relevant extent. However, there is still no consensus on the parameters applied in TMS and tDCS techniques for CPP. CONCLUSION: Non-invasive neuromodulation improves pain levels and quality of life in patients with CPP. Further studies are needed to establish more reliable parameter relationships, and the limited number of studies restricts definitive conclusions on the subject.
RESUMO JUSTIFICATIVA E OBJETIVOS: A dor pélvica crônica (DPC) é caracterizada pela persistência da dor na região pélvica por mais de seis meses, afetando tanto homens quanto mulheres e causando prejuízos significativos na qualidade de vida (QV). Duas das principais abordagens não invasivas são Estimulação Magnética Transcraniana (EMT) e a Estimulação Transcraniana por Corrente Contínua (ETCC). Nesse contexto, esta pesquisa realizou uma revisão integrativa da literatura com o intuito de resumir os resultados de estudos relevantes, buscando identificar os principais parâmetros utilizados no tratamento da DPC. O objetivo foi fornecer uma visão abrangente sobre essas técnicas de neuromodulação e suas aplicações específicas no controle da dor pélvica crônica. CONTEÚDO: Para esta revisão integrativa, as buscas eletrônicas ocorreram nas bases de dados Pubmed, Scielo, PEDro, Medline, Cochrane e Scopus, verificando estudos em português, inglês ou espanhol. "Dor pélvica", "estimulação transcraniana por corrente contínua" e "estimulação magnética transcraniana" e suas derivações foram pesquisadas nos três idiomas em estudos entre 2013 e 2023. Sete estudos foram incluídos para análise. Ambas as técnicas apresentaram efeitos positivos no manejo da DPC, melhorando os níveis de dor e a QV em proporções relevantes. Entretanto, ainda não há um consenso sobre os parâmetros aplicados nas técnicas de EMT e ETCC para DPC. CONCLUSÃO: A neuromodulação não invasiva melhora os níveis de dor e a QV em pacientes com DPC. São necessários mais estudos para que relações mais confiáveis de parâmetros possam ser preestabelecidas e a ausência de um maior número de estudos limita conclusões acerca do assunto.
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Abstract Introduction Fibromyalgia is a complex, generalized, and diffuse chronic musculoskeletal pain. Pharmacological approaches are widely used to relieve pain and increase quality of life. Low-Dose Naltrexone (LDN) was shown to increase the nociceptive threshold in patients with fibromyalgia. Transcranial Direct Current Stimulation (tDCS) is effective for pain management. Objective The purpose of this study was to evaluate the analgesic and neuromodulatory effects of a combination of LDN and tDCS in patients with fibromyalgia. Methods This was a randomized, double-blinded, parallel, placebo/sham-controlled trial (NCT04502251; RBR-7HK8N) in which 86 women with fibromyalgia were included, and written informed consent was obtained from them. The patients were allocated into four groups: LDN + tDCS (n = 21), LDN + tDCS Sham (n = 22), placebo + tDCS (n = 22), and placebo+tDCS Sham (n = 21). The LDN or placebo (p.o.) intervention lasted 26 days; in the last five sessions, tDCS was applied (sham or active, 20 min, 2 mA). The following categories were assessed: sociodemographic, Visual Analog Pain Scale (VAS), Pain Catastrophizing Scale (PCS), State-Trait Anxiety Inventory (STAI), Fibromyalgia Impact Questionnaire (FIQ), Beck Depression Inventory (BDI-II), Profile of Chronic Pain Scale (PCP:S), Pain Pressure Threshold (PPT), and Conditioned Pain Modulation (CPM). Blood samples were collected to analyze BDNF serum levels. Results At baseline, no significant difference was found regarding all measurements. VAS pain was significantly reduced in the LDN + tDCS (p = 0.010), LDN + tDCS Sham (p= 0.001), and placebo+tDCS Sham (p= 0.009) groups. In the PCP:S, the LDN+tDCS group showed reduced pain frequency and intensity (p= 0.001), effect of pain on activities (p= 0.014) and emotions (p= 0.008). Depressive symptoms reduced after all active interventions (p > 0.001). Conclusion Combined LDN+tDCS has possible benefits in reducing pain frequency and intensity; however, a placebo effect was observed in pain using VAS, and further studies should be performed to analyze the possible association.
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Humans , Female , Fibromyalgia , Transcranial Direct Current Stimulation , Quality of Life , Double-Blind Method , Chronic Pain/drug therapy , NaltrexoneABSTRACT
ABSTRACT Objective: Verify the clinical efficacy and safety of a low-cost tDCS device, in a clinical trial for major depressive disorder. Methods: 168 persons were recruited; 32 depressed individuals with moderate or severe depressive symptoms (HDRS17 scores higher than 18) were included and randomized for the trial (16 individuals in each group). The intervention consisted of 10 active anodal tDCS sessions at 2 mA for 30 minutes over the left dorsolateral prefrontal cortex; or sham. The main outcome was HDRS17; secondary outcomes included satisfaction (TSQM II) and quality of life (WHOQOL-BREF). Assessments at baseline, endpoint and at 30 days follow-up. Results: The sample was composed by a total of 11 men and 21 women, mean age of 42.75 years (95% CI: 38.10-47.40). Active treatment was superior than sham: There was a significant interaction between group and time regarding HDRS-17 scores (F = 4.089, df = 2, p = 0.029; partial Eta squared = 0. 239). Post hoc analyses exhibited a statistically significant difference between active and sham group symptoms after a 30 days follow-up (difference = -7.75, p = 0.008, Cohen's d = 1.069). There were 3 dropouts, all in the active group, due schedule issues. No severe adverse effects reported. Conclusion: The current active tDCS protocol was related with clinical improvement of depressive symptoms. Intervention was well-tolerated. Non-invasive brain stimulation techniques are still not routinely used, although a viable strategy for treatment-resistant patients, partial responders and people unable to use pharmacological treatment. We aim to increase knowledge and use of tDCS for the Brazilian population.
RESUMO Objetivo: Testar a eficácia clínica e a segurança de equipamento de estimulação elétrica transcraniana por corrente contínua (ETCC) de baixo custo em ensaio clínico para transtorno depressivo maior (TDM). Métodos: Foram recrutadas 168 pessoas e incluídos e randomizados 32 indivíduos com depressão moderada ou grave (escores na HDRS17 >18; 16 indivíduos em cada grupo). A intervenção consistiu de 10 sessões de ETCC ativa a 2 mA no córtex pré-frontal dorsolateral esquerdo por 30 minutos, ou sham. O desfecho principal foi HDRS17; os desfechos secundários foram satisfação (TSQM II) e qualidade de vida (WHOQOL-BREF). Avaliações no início, no final do tratamento e após 30 dias de seguimento. Resultados: A amostra foi composta de 11 homens e 21 mulheres, com idade média de 42,75 anos (IC 95%: 38,10 a 47,40). O tratamento ativo foi superior ao sham: houve interação significativa entre grupo e tempo em relação aos escores de HDRS17 na ANOVA (F = 4,089, df = 2, p = 0,029; partial Eta squared = 0,239). A análise post hoc mostrou diferença significativa na HDRS17 no follow-up após 30 dias (diferença = -7,75, p= 0,008, Cohen's d = 1,069). Houve 3 dropouts, todos no grupo ativo, devido a problemas de agenda. Não houve registro de efeitos adversos graves. Conclusão: O tratamento ativo teve relação com melhora clínica de sintomas depressivos. A intervenção foi bem tolerada. Técnicas de estimulação cerebral não invasivas ainda não são rotina na prática clínica, apesar de estratégias viáveis para pacientes resistentes a tratamento, respondedores parciais e pessoas com intolerância a medicamentos. Esperamos ampliar o conhecimento e o uso de protocolos de ETCC na população brasileira.
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A impulsividade é um fenômeno multifacetado e é caracterizada por diferentes padrões cognitivos e comportamentais que podem levar a consequências disfuncionais imediatas e em médio/longo prazo. O tratamento da impulsividade tem sido um grande desafio na área da saúde mental, pois não há muitas ferramentas bem descritas e cientificamente validadas que sejam eficazes para a melhora do bem-estar geral desses indivíduos. Dentre as abordagens gerais que podem ser utilizadas para isso, destacam-se as intervenções farmacológicas, atividades físicas e abordagens psicoterápicas como a terapia cognitivo-comportamental (TCC), o treinamento de habilidades sociais e emocionais e a terapia de controle de impulsos. Neste estudo, iremos analisar outras três técnicas não farmacológicas promissoras para serem utilizadas no controle de impulso que são as técnicas de Yoga, Mindfulness e Neuromodulação não invasiva. Para isso, fizemos três revisões sistemáticas conduzidas em acordo com os critérios do PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses). Os protocolos de revisão foram registrados no Registro Prospectivo Internacional de Revisões Sistemáticas (PROSPERO). Para escolha dos descritores que seriam utilizados na busca foi utilizado o Medical Subject Headings (MeSH). A pesquisa pelos artigos foi feita nas bases de dados da PubMed, Scopus, Science Direct e Embase. Só foram incluídos artigos em inglês e não houve delimitação de período de publicação dos artigos incluídos. Os artigos incluídos nesta revisão sistemática foram selecionados de forma independente por dois revisores distintos. Eles realizaram a seleção em duas etapas, sendo a primeira baseada na leitura dos títulos e resumos e a segunda com a leitura completa do texto e caso houvesse divergência na seleção dos artigos, um terceiro revisor foi acionado. A qualidade dos estudos incluídos nestas revisões sistemáticas foi avaliada utilizando a ferramenta Cochrane Risk of Bias tool. Ao final da seleção dos artigos, 6 artigos foram analisados no estudo sobre yoga, 18 no de Mindfulness e 18 no de Neuromodulação não invasiva (9 artigos sobre Estimulação Transcraniana por Corrente Contínua (ETCC) e 9 sobre Estimulação Magnética Transcraniana (EMT)) e foi realizada metanálise de seus dados. Com base nos resultados obtidos, as técnicas de Yoga e Mindfulness surgem como promissoras no tratamento da impulsividade, demonstrando efetividade em diversos testes psicométricos e escalas. Essas abordagens terapêuticas são de fácil implantação, escaláveis e apresentam baixo custo, o que as torna viáveis tanto para o contexto clínico quanto para a saúde pública. Por outro lado, os estudos sobre ETCC e EMT ainda carecem de evidências suficientes para embasar sua implementação no tratamento da impulsividade. A falta de padronização nos estímulos utilizados e a diversidade nos desenhos de estudo dificultam a definição de protocolos efetivos. Portanto, futuras pesquisas serão necessárias para estabelecer parâmetros mais específicos e padrões de intervenção claros para essas técnicas de neuromodulação não invasiva no contexto da impulsividade.
Impulsivity is a multifaceted phenomenon characterized by different cognitive and behavioral patterns that can lead to immediate and medium-to-long-term dysfunctional consequences. The treatment of impulsivity has been a major challenge in the field of mental health, as there are not many well-described and scientifically validated tools that are effective in improving the overall well-being of these individuals. Among the general approaches that can be used for this purpose, pharmacological interventions, physical activities, and psychotherapeutic approaches such as cognitive-behavioral therapy (CBT), social and emotional skills training, and impulse control therapy stand out. In this study, we will analyze three other promising non-pharmacological techniques for impulse control, namely Yoga, Mindfulness, and non-invasive neuromodulation. To do so, we conducted three systematic reviews in accordance with the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) criteria. The review protocols were registered in the International Prospective Register of Systematic Reviews (PROSPERO). The Medical Subject Headings (MeSH) were used to select the descriptors for the search. The article search was conducted in the PubMed, Scopus, Science Direct, and Embase databases. Only articles in English were included, and there was no restriction on the publication period of the included articles. The articles included in this systematic review were independently selected by two different reviewers. They performed the selection in two stages, the first based on the reading of titles and abstracts, and the second with the full-text reading. In case of divergence in the article selection, a third reviewer was consulted. The quality of the studies included in these systematic reviews was assessed using the Cochrane Risk of Bias tool. At the end of the article selection process, 6 articles were analyzed in the Yoga study, 18 in the Mindfulness study, and 18 in the non-invasive neuromodulation study (9 articles on Transcranial Direct Current Stimulation (tDCS) and 9 on Transcranial Magnetic Stimulation (TMS)), and a meta-analysis of their data was performed. Based on the results obtained, Yoga and Mindfulness techniques emerge as promising in the treatment of impulsivity, demonstrating effectiveness in various psychometric tests and scales. These therapeutic approaches are easy to implement, scalable, and cost-effective, making them viable for both clinical and public health contexts. On the other hand, studies on tDCS and TMS still lack sufficient evidence to support their implementation in the treatment of impulsivity. The lack of standardization in the stimuli used and the diversity in study designs hinder the definition of effective protocols. Therefore, future research will be necessary to establish more specific parameters and clear intervention standards for these non-invasive neuromodulation techniques in the context of impulsivity
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There is a high demand for stroke rehabilitation in the Brazilian public health system, but most studies that have addressed rehabilitation for unilateral spatial neglect (USN) after stroke have been performed in high-income countries. Therefore, the aim of this study was to analyze USN patient recruitment in a multicenter noninvasive brain stimulation clinical trial performed in Brazil and to provide study design recommendations for future studies. We evaluated the reasons for exclusion of patients from a multicenter, randomized, double-blinded clinical trial of rehabilitation of USN patients after stroke. Clinical and demographic variables were compared between the included and excluded patients. A descriptive statistical analysis was performed. Only 173 of the 1953 potential neglect patients (8.8%) passed the initial screening. After screening evaluation, 87/173 patients (50.3%) were excluded for clinical reasons. Cognitive impairment led to the exclusion of 21/87 patients (24.1%). Low socioeconomic status led to the exclusion of 37/173 patients (21.4%). Difficulty obtaining transportation to access treatment was the most common reason for their exclusion (16/37 patients, 43.3%). The analyzed Brazilian institutions have potential for conducting studies of USN. The recruitment of stroke survivors with USN was restricted by the study design and limited financial support. A history of cognitive impairment, intracranial stenting or craniectomy, and lack of transportation were the most common barriers to participating in a multicenter noninvasive brain stimulation trial among patients with USN after stroke.
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ObjectiveTo explore the effect of anodal transcranial direct current stimulation (atDCS) on premotor cortex (PMC) on upper limb motor function in patients with severe stroke. MethodsFrom June, 2021 to December, 2022, 60 patients with severe stroke in Zhejiang Provincial People's Hospital were randomly divided into control group (n = 20), primary motor cortex (M1) group (n = 20) and PMC group (n = 20). All the groups accepted routine rehabilitation treatment, while the control group accepted atDCS pseudo stimulation to the focus side PMC, M1 group accepted atDCS to the focus side M1, and PMC group accepted atDCS to the focus side PMC, for six weeks. Fugl-Meyer Assessment-Upper Extremities (FMA-UE), Wolf Motor Function Test (WMFT), the surface electromyography root mean square (RMS) ratio of affected/unaffected side of triceps and extensor carpus were used to evaluate the efficacy before and after treatment. ResultsAfter treatment, the scores of FMA-UE and WMFT, and RMS ratio of triceps and extensor carpus significantly increased in all the groups (|t| > 2.458, P < 0.05), and were better in PMC group than in the other two groups (F > 4.084, P < 0.05). ConclusionatDCS on PMC could improve the overall function of upper limb in patients with severe stroke.
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ObjectiveTo investigate the effect of high-definition transcranial direct current stimulation (HD-tDCS) combined with rehabilitation robot on upper limb and hand dysfunction in patients with subacute stroke. MethodsFrom December, 2019 to December, 2021, 50 inpatients with subacute stroke in Zhejiang Provincial People's Hospital were randomly divided into control group (n = 25) and experimental group (n = 25). Both groups received routine rehabilitation therapy, while the control group added sham HD-tDCS combined with rehabilitation robot, and the experimental group added HD-tDCS combined with rehabilitation robot, for four weeks. The upper limb and hand function was assessed with Action Research Arm Test (ARAT), Fugl-Meyer Assessment-Upper Extremities (FMA-UE) and Motor Assessment Scale (MAS) before and after treatment. ResultsAfter treatment, the scores of ARAT, FMA-UE and MAS increased in the two groups (∣Z∣ > 3.320, t > 6.379, P < 0.01), while the scores of FMA-UE and MAS were higher in the experimental group than in the control group (Z = -2.379, t = 3.181, P < 0.05), as well as the scores of grasping and gross motor of ARAT (∣Z∣ > 2.033, P < 0.05). ConclusionThe combination of HD-tDCS and rehabilitation robot can be more effective on upper limb and hand function in patients with subacute stroke than rehabilitation robot alone.
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Sports fatigue of the lower limbs is one of the important factors affecting sports performance. How to improve the anti-fatigue ability of the lower limbs during endurance exercise is the focus of the research field of human sports biomechanics. This study systematically reviewed the relevant literature on transcranial direct current stimulation (tDCS) intervention on lower limb endurance performance, summarized the effect of tDCS on lower limb endurance performance, and analyzed the influencing factors and potential mechanisms. The results showed that: tDCS intervention has a significant effect on the endurance performance of the whole lower limbs, but there is no unified conclusion on the effect on the endurance performance of the knee joint. The researchers deem that tDCS can increase the excitability of the primary motor cortex and reduce the activation of the supplementary motor area and the premotor area to producing a lower rating of perceived exertion, but cannot affect the perception of exercise-induced pain, and stimulation protocols varied across studies, which may be partly responsible. This study can provide a theoretical basis for exploring the central mechanism of tDCS to improve endurance performance, formulating rehabilitation and sports training programsfor different groups of people, and developing new stimulation equipment to enhance the human body’s anti fatigue ability.
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Objective: To observe the effects of transcranial direct current stimulation (tDCS) on nerve injury markers and prognosis in patients with acute severe carbon monoxide poisoning (ASCOP) . Methods: In May 2021, 103 ASCOP patients were treated in the emergency department of Harrison International Peace Hospital of Hebei Medical University from November 2020 to January 2021. The patients were divided into two groups according to whether they received tDCS treatment. The control group (50 cases) were given oxygen therapy (hyperbaric oxygen and oxygen inhalation) , reducing cranial pressure, improving brain circulation and cell metabolism, removing oxygen free radicals and symptomatic support, and the observation group (53 cases) was treated with 2 weeks of tDCS intensive treatment on the basis of conventional treatment. All patients underwent at least 24 h bispectral index (BIS) monitoring, BIS value was recorded at the hour and the 24 h mean value was calculated. Neuron-specific enolase (NSE) and serum S100B calcium-binding protein (S100B) were detected after admission, 3 d, 7 d and discharge. Follow-up for 60 days, the incidence and time of onset of delayed encephalopathy (DEACMP) with acute carbon monoxide poisoning in the two groups were recorded. Results: The NSE and S100B proteins of ASCOP patients were significantly increased at admission, but there was no significant difference between the two groups (P=0.711, 0.326) . The NSE and S100B proteins were further increased at 3 and 7 days after admission. The increase in the observation group was slower than that in the control group, and the difference was statistically significant (P(3 d)=0.045, 0.032, P(7 d)=0.021, 0.000) ; After 14 days, it gradually decreased, but the observation group decreased rapidly compared with the control group, with a statistically significant difference (P=0.009, 0.025) . The 60 day follow-up results showed that the incidence of DEACMP in the observation group was 18.87% (10/53) , compared with 38.00% (19/50) in the control group (P=0.048) ; The time of DEACMP in the observation group[ (16.79±5.28) d] was later than that in the control group[ (22.30±5.42) d], and the difference was statistically significant (P=0.013) . Conclusion: The early administration of tDCS in ASCOP patients can prevent the production of NSE and S100B proteins, which are markers of nerve damage. and can improve the incidence and time of DEACMP.
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Humans , Biomarkers , Brain Diseases/therapy , Carbon Monoxide Poisoning/therapy , Oxygen , Phosphopyruvate Hydratase , Prognosis , S100 Calcium Binding Protein beta Subunit , Transcranial Direct Current StimulationABSTRACT
ObjectiveTo explore the effect of transcranial direct current stimulation (tDCS) combined with acupuncture on central and upper limb function in stroke patients at flaccid stage based on central-peripheral-central theory. MethodsFrom September, 2018 to December, 2021, 120 patients with upper limb dysfunction after stroke in Guangdong Work Injury Rehabilitation Hospital were selected and randomly divided into control group 1 (n = 40), control group 2 (n = 40) and experimental group (n = 40). All the groups received conventional rehabilitation treatment. In addition, the control group 1 received acupuncture treatment, the control group 2 received anodal tDCS, and the experimental group received combined treatment of both, for four weeks. They were assessed with Fugl-Meyer Assessment-Upper Extremities (FMA-UE) and modified Barthel Index (MBI) before and after treatment. Electroencephalograph (EEG) was used to detect brain symmetry index (BSI), and electromyography (EMG) was used to detect root mean square values (RMS) of triceps brachii, biceps brachii, extensor wrist and flexor wrist of the affected upper limbs. ResultsTwo cases in the control group 1, one in the control group 2 and one in the experimental group dropped off, respectively. After treatment, the scores of FMA-UE and MBI significantly increased in all the groups (t > 11.757, P < 0.001), and they were higer in the experimental group than in the control groups (P < 0.001); the BSI decreased in the control group 2 and the experimental group (t > 2.324, P < 0.05), and it was less in the experimental group than in the control group 2 (P < 0.05); the RMS of biceps increased in all the groups (t > 2.953, P < 0.01), and was higer in the experimental group than in the control groups (P < 0.05); the RMS of flexor wrist and triceps increased in the control group 1 and the experimental group (t > 2.230, P < 0.05), and were higher in the experimental group than in the control group 1 (P < 0.05); the RMS of wrist extensor muscle increased only in the experimental group (t = 3.350, P < 0.01). ConclusiontDCS combined with acupuncture based on central-peripheral-central theory could effectively improve the upper limb function of stroke patients at flaccid stage, with advantages in improving hemispheric asymmetry and enhancing the activation level of affected muscles.
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ObjectiveTo observe the effect of transcranial direct current stimulation (tDCS) combined with task-oriented rehabilitation training single pellet reaching and grasping (SPG) on the motor function of forelimb in rats with unilateral contusion of C5 spinal cord. MethodsA total of 60 adult male Sprague-Dawley rats were randomly divided into sham operation group (sham group), spinal cord injury (SCI) group, tDCS group, SPG group, false group and tDCS+SPG group, with ten rats in each group. Only C5 lamina was removed in the sham group, and the C5 spinal cord contusion model was established by IH spinal cord impactor in the other five groups. The rats received tDCS in tDCS group, SPG in SPG group, tDCS without current in false group, tDCS combined with SPG in tDCS+SPG group, and no treatment in the SCI and the sham groups. The rats were evaluated with Rearing and Grooming tests, and motor-evoked potential (MEP). ResultsFour weeks after operation, compared with SCI group, the scores of Rearing and Grooming increased in tDCS group and tDCS+SPG group (P < 0.05), and they were more in the tDCS+SPG group than in tDCS group and SPG group (P < 0.05); the score of Grooming increased in SPG group (P < 0.05); while the amplitude of MEP increased in tDCS group, SPG group and tDCS+SPG group (P < 0.05), and the latency shortened in tDCS group and tDCS+SPG group (P < 0.05); and the amplitude increased more in tDCS+SPG group than in tDCS group and SPG group (P < 0.01). ConclusiontDCS could promote the recovery of motor function in rats with SCI, and the combination therapy of tDCS and task-oriented rehabilitation training is more effective.
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Objective:To observe any effect of combining music exercise with transcranial direct current stimulation (tDCS) on the motor control, balance and cognition of persons with Parkinson′s disease (PD).Methods:A total of 120 PD patients were randomly divided into a control group, a music exercise group, a tDCS group and a combined group, each of 30. All received routine rehabilitation training, while the music exercise, tDCS and combined groups were additionally provided with music exercise therapy, tDCS treatment or both, respectively. Version three of the unified Parkinson′s disease scale (UPDRSIII), a 10m reentry movement test, the Berg balance scale (BBS), the Activity Balance Confidence scale (ABC) and Montreal cognitive assessments were applied before and after 4 weeks of the treatments.Results:After the treatment, the average UPDRSIII score and 10m reentry movement time of the music exercise group were significantly lower than in the control group, while the average BBS and ABC scores were significantly higher than the control group′s averages. The tDCS group′s average MoCA scores on all of the items and its total score were significantly higher than those of the music exercise and control groups. The average UPDRSIII score and 10m reentry movement time of the combined group were the lowest after the treatment, and that group′s average BBS, ABC, MoCA and total scores were the highest, significantly better than the other three groups.Conclusion:Combining music exercise training with tDCS can effectively improve the motor functioning, balance and cognition of persons with PD.
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Objective:To observe any effect of transcranial direct current stimulation (tDCS) on the cognition of stroke survivors and the integrity of their white matter fibers.Methods:Thirty persons with post-stroke cognitive impairment (PSCI) were randomly divided into an experimental group ( n=15) and a control group ( n=15). In addition to basic drug therapy and routine cognition training, the experimental group received 20 minutes of tDCS daily, 5 days per week for 3 weeks, while the control group received sham tDCS stimulation. Before and after the treatment, both groups′ cognitive functioning was evaluated using the mini-mental state examination (MMSE) and the Montreal cognitive assessment scale (MoCA). Their ability in the activities of daily living (ADL) was quantified using the modified Barthel index (MBI). Diffusion tensor imaging (DTI) was employed to observe any changes in the integrity of their white matter fibers. Results:The average MMSE, MOCA and MBI scores of both groups had improved significantly after the treatment, but the improvement in the experimental group was significantly greater than among the controls. The average fractional anisotroposy value of the affected inferior fronto-occipital fasciculus in both groups was positively correlated with the group′s average MMSE score and MoCA score.Conclusion:tDCS can effectively improve the cognition and functioning in the activities of daily living of stroke survivors. Its mechanism may be related to improving the integrity of the white matter fibers involved.
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Objective:To observe any effect of transcranial direct current stimulation (tDCS) on learning, memory ability and the morphology of neurons in the hippocampus and cortex of rats with cognitive impairment, and also to seek any correlation between the rats′ behavior and the thickness of the granular layer in the CA1 region of the hippocampus.Methods:Thirty Sprague-Dawley rats were randomly divided into an observation group, a model group and a control group, each of 10. Cognitive impairment was induced in the observation and model groups by intraperitoneal injection of scopolamine, while the control group was injected with saline solution over the same period of time. After successful modeling, the observation group was given tDCS, while the model and control groups were connected with electrodes but not given any electrical stimulation. After 16 consecutive days of treatment, behavioral changes of each group were quantified using a shuttle box and a Morris water maze. On the 30th day after the mode-ling, the brains were collected to observe any changes in the morphology of the hippocampal and cortical neurons. The thickness of the hippocampal granular layer was also measured.Results:In the observation group the average rate of electrical impulses after the intervention [(60.5±6.67)/min] was significantly less than in the model group [(145.8±19.31)/min], while the time to find a platform was significantly shorter. The rats of the observation group also crossed the D quadrant of the platform significantly more quickly than the model group, on average. Compared with the control group, the granular layer in the CA1 region of the hippocampus [(93.47±1.07)μm] was significantly thinner on average than in the model group but compared with the model group, the observation group had significantly thicker layers [95.17±1.49)μm] on average. The thickness was negatively correlated with the number of shocks and the time to find the platform, but positively correlated with the number of crossings of the platform in the D quadrant.Conclusions:The degree of impairment generated by intraperitoneal injection of scopolamine correlates with the thickness of the CA1 granular layer of the hippocampus, at least in rats. tDCS can improve the learning and memory of such rats. Its mechanism may be related to promoting structural recovery of hippocampal cortical neurons and increasing the thickness of the granular layer.
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Objective:To investigate the effect of cathodic transcranial direct current stimulation (ctDCS) combined with upper limb robot therapy (RT) on the rehabilitation of upper limb motor function in stroke patients.Methods:Forty patients with stroke hemiplegia who met the enrollment criteria were randomly divided into a pseudo-stimulation group ( n = 20) and a stimulation group ( n = 20). In addition to conventional treatment in both groups, ctDCS + RT was used in the stimulation group, and sham stimulation + RT was used in the sham-stimulation group. Treatment was performed 10 times, 5 times per week, for 30 minutes each time. Patients in both groups were evaluated before, during, and after treatment using the Brunnstrom Staging Scale, the Modified Barthel Index (MBI) scale, and the Modified Ashworth Scale (MAS), respectively. Results:Compared with the same group before treatment, there were statistically significant differences in Brunnstrom’s rating grade Ⅳ for upper limbs and hands in both groups during and after treatment (all P < 0.05). Compared with the same group during treatment, there were statistically significant differences in Brunnstrom’s rating grade Ⅳ for upper limbs and hands in both groups after treatment (all P < 0.05). MBI scores were higher in two groups during and after treatment compared to the same group before treatment (all P < 0.05). MBI scores were higher in two groups after treatment compared to the same group during treatment (all P < 0.05). The MBI scores after treatment in the stimulation group were higher than those in the pseudo-stimulation group ( P < 0.05). The MAS scores of elbow flexion grade 2 and extension grade 4 and shoulder flexion grade 2, extension grade 2, adduction grade 2, and abduction grade 2 were lower in both groups after treatment compared with the same group before treatment (all P < 0.05). Conclusions:Cathodic transcranial direct current stimulation combined with robotic therapy can effectively promote upper limb motor function rehabilitation in stroke patients and is superior to upper limb robotic therapy alone.