O anti-grupo como fenómeno. Reflexão sobre as resistências nos grupos comunitários de articulação (inter)institucional / The antigoup as a phenomenon. Reflection on the resistance in community groups of (inter)institutional articulation / El antigrupo como fenómeno. Reflexión sobre la resistencia en grupos comunitarios de articulación (inter)institucional

Objetivo: Com esta reflexão a autora pretende contribuir para uma maior compreensão dos fenómenos grupais presentes no trabalho de articulação (inter)institucional dos vários profissionais que intervêm na área da saúde mental comunitária. Metodologia: Partindo da sua experiência a autora reflete sobre as múltiplas formas de resistência que podemos encontrar nos grupos de profissionais que intervêm na área da saúde mental comunitária, nomeadamente as resistências que diretamente se manifestam na articulação de âmbito interinstitucional entre profissionais relacionando, de entre outros, o conceito de anti-grupo, cunhado por Morris Nitsun, com os entraves ao funcionamento destes grupos (inter)institucionais. Resultados: São identificados os fenómenos agressivos e destrutivos que se podem constituir como resistências e proposta a sua origem nos mecanismos psíquicos como a transferência, clivagens, deslocamentos, projeções e identificações projetivas. Conclusões: O pensamento e compreensão grupanalítica do funcionamento dos grupos de trabalho é fundamental para que o potencial agressivo e destrutivo dos grupos não seja desvalorizado, ignorado ou estimulado, contribuindo para o seu sucesso.

Objective: With this reflection, the author intends to contribute to a greater understanding of the group phenomena present in the work of inter-institutional articulation in the field of community mental health. Metodology: Based on her experience, the author reflects on the multiple forms of resistance that we can find in groups of professionals who intervene in the area of community mental health, namely the resistance that directly manifests itself in the inter-institutional articulation between professionals relating, among others, the anti-group concept, coined by Morris Nitsun, with the obstacles to the functioning of these inter-institutional groups. Results: Aggressive and destructive phenomena that can constitute resistances are identified and their origin is proposed in internal mechanisms such as transference, cleavages, projections and projective identifications. Conclusions: A groupanalytic thinking and understanding of the functioning of inter-institutional work groups is essencial so that the aggressive and destructive potential of groups is not devalued, ignored or stimulated, contributing to their success.

Objetivo: Con esta reflexión, el autor pretende contribuir a una mayor comprensión de los fenómenos grupales presentes en el trabajo de articulación interinstitucional en el campo de la salud mental comunitaria. Metodología: A partir de su experiencia, la autora reflexiona sobre las múltiples formas de resistencia que podemos encontrar en los grupos de profesionales que intervienen en el área de la salud mental comunitaria, a saber, la resistencia que se manifiesta directamente en la articulación interinstitucional entre profesionales que se relacionan, entre otros, el concepto de antigrupo, acuñado por Morris Nitsun, con los obstáculos para el funcionamiento de estos grupos interinstitucionales. Resultados: Se identifican fenómenos agressivos y destructivos que pueden constituir resistência y se propone su origen en mecanismos psíquicos como la transferência, escisiones, desplazamientos, proyecciones y identificaciones proyectivas. Conclusiones: El pensamiento grupoanalítico y la comprensión del funcionamento de los grupos de trabajo es fundamental para que el potencial agressivo y destructivo de los grupos no sea devaluado, ignorado o estimulado, contribuyendo a su éxito.

Comportamiento Mecánico de un Premolar Humano Sano Sometido a Fuerzas Funcionales y Disfuncionales en un MEF / Mechanical Behavior of a Healthy Human Premolar Subjected to Functional and Dysfunctional Forces in a FEM

El propósito de este estudio fue analizar el comportamiento mecánico de la estructura dental sana de un primer premolar inferior humano sometido a fuerzas funcionales y disfuncionales en diferentes direcciones. Se buscó comprender, bajo las variables contempladas, las zonas de concentración de esfuerzos que conllevan al daño estructural de sus constituyentes y tejidos adyacentes. Se realizó el modelo 3D de la reconstrucción de un archivo TAC de un primer premolar inferior, que incluyó esmalte, dentina, ligamento periodontal y hueso alveolar considerando tres variables: dirección, magnitud y área de la fuerza aplicada. La dirección fue dirigida en tres vectores (vertical, tangencial y horizontal) bajo cuatro magnitudes, una funcional de 35 N y tres disfuncionales de 170, 310 y 445 N, aplicadas sobre un área de la cara oclusal y/o vestibular del premolar que involucró tres contactos estabilizadores (A, B y C) y dos paradores de cierre. Los resultados obtenidos explican el fenómeno de combinar tres vectores, cuatro magnitudes y un área de aplicación de la fuerza, donde los valores de esfuerzo efectivo equivalente Von Mises muestran valores máximos a partir de los 60 MPa. Los valores de tensión máximos se localizan, bajo la carga horizontal a 170 N y en el proceso masticatorio en la zona cervical, cuando la fuerza pasa del 60 %. Sobre la base de los hallazgos de este estudio, se puede concluir que la reacción de los tejidos a fuerzas funcionales y disfuncionales varía de acuerdo con la magnitud, dirección y área de aplicación de la fuerza. Los valores de tensión resultan ser más altos bajo la aplicación de fuerzas disfuncionales tanto en magnitud como en dirección, produciendo esfuerzos tensiles significativos para la estructura dental y periodontal cervical, mientras que, bajo las cargas funcionales aplicadas en cualquier dirección, no se generan esfuerzos lesivos. Esto supone el reconocimiento del poder de detrimento estructural del diente y periodonto frente al bruxismo céntrico y excéntrico.

SUMMARY: The purpose of this study was to analyze the mechanical behavior of the healthy dental structure of a human mandibular first premolar subjected to functional and dysfunctional forces in different directions. It was sought to understand, under the contemplated variables, the areas of stress concentration that lead to structural damage of its constituents and adjacent tissues. The 3D model of the reconstruction of a CT file of a lower first premolar was made, which included enamel, dentin, periodontal ligament and alveolar bone considering three variables: direction, magnitude and area of the applied force. The direction was directed in three vectors (vertical, tangential and horizontal) under four magnitudes, one functional of 35 N and three dysfunctional of 170, 310 and 445 N, applied to an area of the occlusal and/or buccal face of the premolar that involved three stabilizing contacts (A, B and C) and two closing stops. The results obtained explain the phenomenon of combining three vectors, four magnitudes and an area of force application, where the values of effective equivalent Von Mises stress show maximum values from 60 MPa. The maximum tension values are located under the horizontal load at 170 N and in the masticatory process in the cervical area, when the force exceeds 60%. Based on the findings of this study, it can be concluded that the reaction of tissues to functional and dysfunctional forces varies according to the magnitude, direction, and area of application of the force. The stress values turn out to be higher under the application of dysfunctional forces both in magnitude and in direction, producing significant tensile stresses for the dental and cervical periodontal structure, while under functional loads applied in any direction, no damaging stresses are generated. This supposes the recognition of the power of structural detriment of the tooth and periodontium against centric and eccentric bruxism.

Traumatismo dentoalveolar en niños y adultos del sistema de salud de la Armada de Chile, 2014-2019

Objetivo: Describir los casos notificados de traumatismos dentoalveolares en dientes temporales y definitivos en la Unidad Clínica de Traumatismo Dentoalveolar de la Armada de Chile en el período 2014-2019. Materiales y Métodos: Descriptivo de tipo transversal. Se incluyeron todos los casos atendidos con diagnóstico de traumatismo dentoalveolar entre 2 a 80 años en la población estudiada. Se realizó un análisis descriptivo utilizando medidas de tendencia central y un modelo de regresión logística. Resultados: Se analizó un total de 326 casos, predominando el género masculino, con una edad media de 25,4 años. El 38% correspondieron a subluxación, siendo la etiología más frecuente la caída con un 69% y el lugar de ocurrencia, el hogar con un 35,6%. La mayoría de los beneficiarios correspondieron a familiares con derecho a atención en el sistema naval, y demoraron menos de 7 días en consultar con un 54.6%. Conclusión: El tipo de traumatismo dentoalveolar más frecuente fue la subluxación. En cuanto a la etiología, destacan las caídas y golpes con objetos, en su mayoría, en el hogar, afectando principalmente a hombres menores de 30 años. El tiempo en consultar e iniciar el tratamiento correspondiente, fue dentro de 7 días.

Objective: To describe the reported cases of dentoalveolar trauma in temporary and permanent teeth in the Clinical Unit of Dentoalveolar Trauma of the Chilean Army in the period 2014-2019. Materials and Methods: Cross-sectional descriptive study. All cases attended with a diagnosis of dentoalveolar trauma between 2 and 80 years old were included in the study population. A descriptive analysis was performed using measures of central tendency and a logistic regression model. Results: A total of 326 cases were analyzed, predominantly male gender, with a mean age of 25.4 years. Thirty-eight percent corresponded to subluxation, the most frequent etiology being fall with 69% and the place of the event, home with 35.6%. Most of the beneficiaries were family members entitled to care in the army system, and took less than 7 days to come for attention with 54.6%. Conclusion: The most frequent type of dentoalveolar trauma was subluxation. As for the etiology, falls and hits with objects stand out, mostly at home, affecting mainly men under 30 years of age. The time to come for consultation and start the corresponding treatment was within 7 days.

Electrocardiogram abnormalities detected during a routine medical examination of healthy members of the armed forces: An observational study

Background and objective: Only few studies addressed ECG findings in healthy members of the Indian armed forces or the general population of India. The study was conducted to assess the prevalence of abnormal electrocardiogram (ECG) detected during a routine medical examination of healthy members of the Indian armed forces. Method: The ECG of all the healthy members performed during a routine medical examination was initially reported by physicians at various armed forces service hospitals in the Eastern Command (EC) and later perused by the cardiologist at Command Hospital Eastern Command (CHEC). Individuals with abnormal ECG underwent relevant cardiac evaluation at CHEC to determine the underlying pathology. Results: A total of 1,045 members of the Indian armed forces were included in the study and were categorised as follows: 244 in Group-1 (aged < 25years), 478 in Group-2 (aged between 25 to 40 years) and 323 in Group-3 (aged > 40years). Abnormal ECG was found in 108 (10.3%) individuals. Left axis deviation was the most common abnormality detected in 18 (1.2%) individuals, followed by incomplete RBBB and T wave inversion which were each found in 15 subjects (1.43% of all individuals and 13.9% of the subjects with abnormal ECG). The prevalence of ECG abnormalities detected in our study was similar to that reported in previous studies. Only five (0.47%) of the 108 individuals with abnormal ECG were found to have underlying cardiovascular disease. Conclusion: Morphological ECG abnormalities were common in the subjects but did not vary significantly from the general population, and only a minority had underlying pathology. While most of the abnormalities may only represent normal variations and their occurrence in healthy individuals during routine health check-ups should not be alarming. Evaluation of structural heart disease should be done for ECG abnormalities with prognostic significance that has been well-characterised.

Evaluation of the occlusal contact area of molar dental implants comparing two different thicknesses (16 µm and 200 µm) of articulating occlusal papers and forces (200 and 250 N): a pivot in vitro study

Introduction: The goal of this pilot study was to evaluate the differences between checking occlusion on implants crowns using 16 or 200 µm thickness of articulating occlusal paper, and to compare the stained occlusal area between the groups after bite forces of 200 and 250 N. Methods: It was included 10 casts of articulated-type IV gypsum, 10 NiCr crowns, articulating occlusal papers (16 µm and 200 µm thick), and a compression test machine. Compressive forces (200 and 250 N.mm) were applied on models, to check the occlusal contact area of fixed and cemented crowns. The contact areas on the crowns were measured through images obtained by the scanning electron microscope. Statistical tests were performed considering the significant level of 5% (p≤0.05). Results: The stains found using 200 µm of articulating paper were higher than those with 16 µm, independent of the force applied. However, the stains obtained in lower teeth with different strengths (200 and 250N) marked with 16 µm articulating paper were not possible to score. The articulating paper variable had significant statistical results (p=0.002), while the variables force (p=0.443) and articulating paper-force interaction (p=0.607) were not significant. The mean area found in staining using the 200 µm and 16 µm papers was, respectively, 8.3380 mm2 and 3.4759 mm2. Conclusion: It was possible to confirm that 200 µm of articulating occlusal paper showed better and significant results to stain the occlusal area, permitting a more accurate adjustment independent of the force applied.

Effect of different tips of posteriors in extraction treatment on three-dimensional forces of teeth with clear aligners / 口腔医学

Objective@#To investigate the three-dimensional forces in real-time at different tips of the posteriors created by clear aligners on maxillary teeth during en-masse retraction of anteriors after 2 first premolars extraction treatment. @*Methods@#Four groups of maxillary models with different tips of posteriors(T1-upright of posteriors, T2-posteriors with distal inclination of 5°, T3-posteriors with mesial inclination of 5°, T4-posteriors with mesial inclination of 10°) undergoing 0.25 mm en-masse retraction treatment using clear aligners were simulated on a multi-axis force/torque transducer measurement system. When each clear aligner was inserted, a computer connected to the transducer collected and recorded the three-dimensional force of every tooth in real-time. Each group included 12 aligners.@*Results@#Incisors received smaller lingual and extrusive forces; canines received greater distal forces; smaller mesial forces were observed on the posteriors, and molars received greater buccal and extrusive forces in T2,compared with T1,which showed statistically significant differences(P<0.05). Incisors received smaller lingual and extrusive forces; canines received greater distal forces; greater mesial forces were observed on the posteriors, and molars received greater buccal and extrusive forces in T3 and T4,compared with T1,which showed statistically significant differences(P<0.05).@*Conclusion@#Posteriors with distal inclination contributed to the torque of the anterior and anchorage of posteriors. In group T2 posterior teeth experienced larger buccal forces and extrusive forces than in group T1. When the posteriors crown inclined mesially, the anterior teeth were more prone to lingual tip and caused overbite. The more mesially inclined the posterior teeth were, the more serious overbite was, and the posterior teeth were more prone to anchorage loss.

Irregular-Shaped Fe3O4 Nanoparticles-Mediated Magneto-Mecha nical Force for Killing Tumor Cell / 医用生物力学

Objective To investigate tumor cell killing effect of superparamagnetic Fe3O4 nanoparticles with cubic phase through magneto-mechanical force under a low-frequency vibrating magnetic field ( VMF). Methods A kind of strong magnetic and irregular-shaped Fe3O4 nanoparticles with cubic phase was synthesized by coprecipitation method. The Fe3O4 nanoparticles were exposed to a self-developed VMF and cell killing efficiency of the Fe3O4-mediated magneto-mechanical force was investigated. Results VMF alone had no effects on cell viability. After Fe3O4 nanoparticles were added, the cell viability significantly decreased with prolonging the VMF treatment time and increasing the Fe3O4 nanoparticle concentration. Lactate dehydrogenase released by damaged cells also increased with prolonging the VMF exposure time. Conclusions The irregular-shaped Fe3O4 nanoparticles can transfer magneto-mechanical force to tumor cells under VMF, cause structural damage of cells and result in cell death. The VMF generator developed in this study has simple structure and it is safe for use and convenient for operation. The developed magnetic nanoparticles and the corresponding cancer cell killing technique have the potential for clinical transformation.

Changes in Brain-Derived Neurotrophic Factor by different kind of military training / Cambios en el Factor Neurotrófico Derivado del Cerebro por diferentes tipos de entrenamiento militar

Abstract Background: Brain Derived Neurotrophic Factor (BDNF) serum levels change with age, physical exercise, and neuropsychiatric disorders such as dementia, depression, anxiety, schizophrenia, and bipolar disorder. Military personnel are physically and mental training with an increased risk of developing mental disorders. Objective: The main objective of this study was determinate the BDNF serum levels in four military samples. 132 participants, administrative personnel (control) and three different Special Operations Forces (SOF) groups participated in the study. Methods: A first group of SOFS was on a training course (SOF-TC), second group exposed to 48 hours of operational stress (SOF-48hS) and third group exposed to two-weeks of operational stress (SOF-2wS). The mini interview was conducted and CAPS, and BNF levels were determined by ELISA assays. Results: Differences in age, were evaluated by ANOVA post-hoc Tukey´s. Differences in BNDF levels are evaluated by the Kruskal-Wallis test post hoc Dunn's. Spearman's correlation was used to analyze the relationship between BDNF and age. The SOF-TC had a BDNF elevation in comparison with Control group that could be related to age differences or the physical and mental training.SOF-2wS had decreased BDNF levels in comparison to the other groups that could be related to the psychosocial stress or other mental disorders such as PTSD. That group, 2 participants showed signs of PTSD. Conclusion: BDNF levels are an accurate method for the evaluation of mental health to prevent, diagnose & treat mental disorders in military personnel exposed to operational stress.

Resumen Introducción: Los niveles séricos del factor neurotrófico derivado del cerebro (BDNF) cambian con la edad, el ejercicio físico y los trastornos neuropsiquiátricos como la demencia, la depresión, la ansiedad, la esquizofrenia y el trastorno bipolar. El personal militar está en formación física y mental con un mayor riesgo de desarrollar trastornos mentales. Objetivo: El objetivo principal de este estudio fue determinar los niveles séricos de BDNF en cuatro muestras militares. Participaron en el estudio 132 individuos entre personal administrativo (control) y tres grupos diferentes de Fuerzas de Operaciones Especiales (SOF). Métodos: Un primer grupo de SOFS estaba en un curso de capacitación (SOF-TC), el segundo grupo expuesto a 48 horas de estrés operativo (SOF-48hS) y el tercer grupo expuesto a dos semanas de estrés operativo (SOF-2wS). Se realizó la minientrevista y se determinaron los niveles de CAPS y BNF mediante ensayos ELISA. Resultados: Las diferencias en edad, se evaluaron mediante ANOVA post hoc de Tukey. Las diferencias en los niveles de BNDF se evalúan mediante la prueba de Dunn post hoc de Kruskal-Wallis. Se utilizó la correlación de Spearman para analizar la relación entre BDNF y la edad. El SOF-TC tuvo una elevación de BDNF en comparación con el grupo control que podría estar relacionado con las diferencias de edad o el entrenamiento físico y mental, tal como PTSD. En ese grupo, dos participantes mostraron signos de PTSD. Conclusión: Los niveles de BDNF son un método preciso para la evaluación de la salud mental para prevenir, diagnosticar y tratar los trastornos mentales en el personal militar expuesto al estrés operativo.

Caracterización del Traumatismo Dentoalveolar Concomitante a Trauma Maxilofacial en Personal Profesional de Fuerzas Armadas: Revisión Narrativa

El trauma maxilofacial es un problema de salud pública, comúnmente asociado a traumatismo dentoalveolar. Su prevalencia es alta, siendo más frecuente en poblaciones de riesgo, como personal de Fuerzas Armadas, esto por sus actividades laborales, generando gran impacto en el paciente. Caracterizar, según la literatura, el traumatismo dentoalveolar concomitante a trauma maxilofacial en el personal profesional de Fuerzas Armadas. Se realizó una revisión narrativa en cuatro bases de datos, en octubre del 2020. Se incluyeron publicaciones de máximo 5 años de antigüedad, en inglés o español, con resumen disponible, estudios primarios y revisiones sistemáticas. Se excluyó publicaciones no disponibles en texto completo y reportes de casos. Se incluyeron 15 artículos. Existe un déficit de evidencia sobre la asociación que existe entre traumatismo dentoalveolar y traumatismo maxilofacial en la población estudiada. Encontrándose que solo el 6,7 % de estos incluía en su análisis la concomitancia entre ambos tipos de traumas. Sin embargo, los diagnósticos más prevalentes consistieron en fracturas coronarias y mandibulares, respectivamente, asociadas a actividades de entrenamiento y combate. Se establece que el tipo de trauma maxilofacial más frecuente en la población profesional de Fuerzas Armadas es la fractura mandibular y en relación al traumatismo dentoalveolar, la fractura coronaria. En cuanto a la etiología, destacan las heridas de bala, explosivos y accidentes en vehículos, afectando principalmente a personal del Ejército entre 18 a 30 años. Es importante mencionar que los artículos incluidos en esta revisión que hacen referencia a la concomitancia entre el traumatismo dentoalveolar y maxilofacial son escasos y no se encuentran actualizados, por lo que, se necesita continuar investigando en esta temática.

The maxillofacial injuries are a public health issue commonly associated to dentoalveolar injuries. Its high prevalence in risk population such as the Armed Forces personnel, due to their work activities, generates a great impact on the patient. Characterize, according to the literature, dentoalveolar injuries within the maxillofacial injuries in professional Armed Forces personnel. A narrative research was conducted on October 2020 with four data bases. Only 5-year-old publications were considered both in English and Spanish, including their available summary, primary studies and systematic revisions. Publications without full access or report cases were not included. Fifteen scientific papers were included. There is a deficit of evidence between maxillofacial and dentoalveolar injuries in the target population. Only 6.7 % of the research included a joint analysis between both traumas, however the most prevalent diagnosis consisted in coronaries and mandibular fractures, in that order, associated mainly to training and combat activities. The most frequent maxillofacial injury within the Armed Forces personnel is the mandibular fracture, and in relation with dentoalveolar injuries is the coronary fracture. Regarding the etiology, gunshot wounds, explosives and car accidents are featured affecting mainly between 18 to 30 years old army personnel. It's relevant to highlight that the scientific papers included in this revision about the association between dentoalveolar and maxillofacial injuries are poor and not updated. Further research is needed in this issue.

Analysis and enlightenment of the layout of the national science and technology innovation platform in the medical field / 中华医学科研管理杂志

Objective:To understand the current situation of the layout of the national science and technology innovation platform in the medical field, and provides a basis for departments to improve the formulation of scientific and technological innovation policies and promote the reform of the mechanism.Methods:The report and the evaluation list of the official websites are the main reference, supplemented by the public information of each platform and the information retrieval and mining of database, select quantitative statistical indicator to analyze data.Results:Platforms rely on a rich variety of units, mainly concentrated in Beijing, Shanghai and other areas with strong research ability, including major disease areas, covering many key medical disciplines.Conclusions:The regional layout is not balanced, and the layout of the type of disease at the subdivision level needs to be further complemented and improved.

Research progress on the relationship between occlusal overload and peri-implantitis / 口腔疾病防治

@#Implant dentures have become the main method for the treatment of dentition defects or complete edentulism. However, due to the lack of periodontal ligament and periodontal ligament proprioceptors, implant dentures have very limited cushioning and sensing capabilities and are prone to occlusal overload. As a risk factor for peri-implantitis, occlusal overload seriously threatens the stability and success rate of implant dentures. This paper reviews the occlusal overload of implant dentures, the causal relationship between occlusal overload and plaque biofilms in peri-implantitis, the mechanism by which occlusal overload promotes peri-implantitis, and the effect of reasonable clinical occlusal adjustment on healing. This review shows that occlusal overload is closely related to the occurrence of peri-implantitis. Occlusal overload can promote the process of peri-implantitis by increasing the release of inflammatory factors and mechanical transduction mechanisms. The intervention of the patients’ bad bite habits and occlusal adjustment can promote the healing of peri-implantitis. At present, there is no uniform standard ideal experimental model for occlusal overload. The phenomenon and mechanism of bone resorption around the implant caused by overload force still need further observation and research, which will help determine the intensity, direction and timing of occlusal loading to guide clinical occlusal adjustment.

Influence of muscle fatigue on the pedaling kinetic and kinematics in different cycling protocols: a scoping review / Influência da fadiga muscular sobre a cinética e cinemática de pedalada em diferentes protocolos de ciclismo: uma revisão de escopo / Influencia de la fatiga muscular en la cinética y cinemática de pedaleo en diferentes protocolos de ciclismo: una revisión del alcance

ABSTRACT The aim of this study was to review the literature on the effects of muscle fatigue generated by different cycling protocols, on the kinetics and kinematics of the crank cycle. Twenty-two studies were included in the review. The establishment of the fatigue processes caused an increase in the resulting and effective forces (all tests), together with the pedaling efficiency (incremental and constant tests). In addition, fatigue caused joint changes in the lower limbs (increased range of motion in the ankle and reduced contribution to total torque) in different cycling tests. Therefore, these pedaling strategies may be related to the maintenance of muscle work to postpone the cyclists' exhaustion.

RESUMO O objetivo deste estudo foi revisar a literatura sobre os efeitos da fadiga muscular gerada por diferentes protocolos de ciclismo, sobre a cinética e cinemática do ciclo de pedalada. Vinte e dois estudos foram incluídos na revisão. A instauração dos processos de fadiga provocou aumento das forças resultante e efetiva (todos os testes), em conjunto com a eficiência de pedalada (testes incremental e constante). Além disso, a fadiga provocou mudanças articulares dos membros inferiores (aumento da amplitude articular do tornozelo e redução da sua contribuição para o torque total), em diferentes testes de ciclismo. Estas estratégias de pedalada podem estar relacionadas à manutenção do trabalho muscular para postergar a exaustão dos ciclistas.

RESUMEN El objetivo de este estudio fue revisar la literatura sobre los efectos de la fatiga muscular generada por diferentes protocolos de ciclismo, sobre la cinética y cinemática del ciclo de pedaleo. Veintidós estudios se incluyeron en la revisión. El establecimiento de los procesos de fatiga provocó un aumento de las fuerzas resultantes y efectivas (todas las pruebas), junto con la eficiencia del pedaleo (prueba incremental y constante). Además, la fatiga provocó cambios articulares en los miembros inferiores (mayor rango de movimiento en el tobillo y menor contribución al torque total) en diferentes pruebas de ciclismo. Estas estrategias de pedaleo pueden estar relacionadas con el mantenimiento del trabajo muscular para posponer el agotamiento de los ciclistas.

Axonal cytomechanics in neuronal development

For more than a century, mechanical forces have been predicted to govern many biological processes duringdevelopment, both at the cellular level and in tissue homeostasis. The cytomechanics of the thin and highlyextended neuronal axons have intrigued generations of biologists and biophysicists. However, our knowledgeof the biophysics of neurite growth and development is far from complete. Due to its motile behavior and itsimportance in axonal pathfinding, the growth cone has received significant attention. A considerable amount ofinformation is now available on the spatiotemporal regulation of biochemical signaling and remodeling of thegrowth cone cytoskeleton. However, the cytoskeletal organization and dynamics in the axonal shaft werepoorly explored until recently. Driven by advances in microscopy, there has been a surge of interest in theaxonal cytoskeleton in the last few years. A major emerging area of investigation is the relationship betweenthe axonal cytoskeleton and the diverse mechanobiological responses of neurons. This review attempts tosummarize our current understanding of the axonal cytoskeleton and its critical role in governing axonalmechanics in the context of neuronal development.

Analgesia for battlefield war wound of special combat personnel: Current status / 第二军医大学学报

Analgesia for battlefield war wound is the beginning of the war wound analgesia management system, and effective analgesia for battlefield war wound plays a significant role in keeping the fighting capacity. Special combat is characterized by the complexity and diversity of combat tasks, small scale of combat units, and limited medical service, resulting in a high incidence of war trauma. Therefore, the battlefield war wound analgesia for special combat personnel has prominent demands. In this paper, we analyzed the characteristics and current situation of battlefield war wound analgesia for special combat personnel, and discussed how to effectively carry out battlefield war wound analgesia, so as to provide reference for improving the fighting capacity of special combat personnel.

Tulio Bayer, Memoria de un revolucionario o, el surgimiento de un nuevo tipo de rebelde en Colombia / Tulio Bayer, Memory of a Revolutionary or the Emergence of a New Type of Rebel in Colombia

Resumen Entre 1959 y 1964 operaron grupos de guerrilleros colombianos que fueron estimulados por el triunfo de la Revolución cubana, estos serían antecesores de las guerrillas que luego de 1964 se consolidaron en el país; con ellos se inició una nueva etapa de la violencia en la que el protagonismo lo asumieron jóvenes estudiantes y profesionales que buscaban trasformar la estructura de la sociedad para superar la desigualdad social. Entre ellos destaca la figura de Tulio Bayer Jaramillo, cuya trayectoria vital ejemplifica la de los jóvenes de su generación que vieron la lucha armada como el mecanismo para hacer la revolución.

Abstract Between 1959 and 1964, groups of Colombian guerrilla people were operated, who were stimulated by the triumph of the Cuban Revolution. These would be the ancestors of the guerrilla groups that after 1964 were consolidated in the country. With them, a new stage of violence began in which young students and professionals, who sought to transform the structure of society, in order to overcome social inequality, assumed the protagonism. Among them, is the figure of Tulio Bayer Jaramillo, whose vital trajectory exemplifies that of the young people of his generation, who saw the armed struggle as the mechanism to make the revolution.

Effect of Physical Activity Intervention on Physical Activity, Body Mass Index, Blood Pressure, Blood Lipid and Fasting Blood Sugar Among Overweight and Obese Military Personnel

Abstract@#Introduction: About 18% of Malaysian Armed Forces (MAF) personnel are diagnosed with either hypertension, diabetes or coronary artery disease, while another 8% are obese. The rising prevalence necessitates intervention. Methods: This is a single blinded randomized controlled trial among overweight and obese MAF personnel attending medical checkup in MAF hospital in Kuala Lumpur. An intervention module was developed to increase their physical activity level. Short version of International Physical Activity Questionnaire was used to assess physical activity in metabolic equivalent of task score (METs score), while blood pressure, body mass index (BMI), blood lipid profile and fasting blood sugar measurements were also obtained. These parameters were measured at baseline and again at 6 months. Generalized estimating equations (GEE) statistical test were applied to evaluate the effect of the intervention. Results: Response rate was 100%. Most of participants were aged above 40 years, male, from Malay ethnic group, completed secondary education and had monthly income above RM 4000. Most of the respondents were obese and had moderate level of physical activity at baseline. All variables compared between groups at baseline showed no significant difference. At six months, after controlling for covariates, the significant difference was only in METs score. The odds of having high METs score in the intervention group after receiving intervention was nearly 3 times higher than those in the control group, after adjusting for interaction between time and group as well as other covariates (AOR = 2.908, 95% CI 1.323 – 6.391, P=0.008). Conclusion: Intervention was effective in increasing physical activity among overweight and obese military personnel.

Variations in shoulder loading due to differences in the site of stepping foot contact during baseball pitching - Comparison between flat ground and mound conditions - / 体力科学

This study examined variations in shoulder loading due to differences in the site of stepping foot contact during baseball pitching, while comparing flat ground and mound conditions. Measurement was performed, involving 10 right-handed pitchers who belonged to university baseball clubs, under original flat ground and mound conditions. Pitching movements were classified into 3 categories: [normal], [narrow], and [outside]. Through 3-dimensional motion analysis using a motion capture system, the following results were obtained: 1. The pitching velocity was significantly higher in the [normal] compared with [narrow] and [outside] conditions and under the mound compared with flat ground condition. 2. The peak torque of the shoulder internal rotation was markedly lower in the [narrow] compared with [normal] condition. There were no significant differences between the [normal] and [outside] conditions or between the flat ground and mound conditions. 3. The posterior, superior, and inferior shearing forces, as well as the proximal traction force, which influence the humeral head of the shoulder, were markedly greater in the [normal] compared with [narrow] and [outside] conditions. The anterior and posterior shearing forces and proximal traction force were significantly greater under the mound compared with flat ground conditions. Based on the results, the internal rotation torque of the shoulder, as well as the shearing and traction forces influencing the humeral head of the shoulder, may vary due to differences in the site of stepping foot contact during baseball pitching and between flat ground and mound conditions. The former may also be useful to prevent pitching-related shoulder injuries.

Research progress in hemorrhage control products of U.S.army / 中华创伤杂志

From Vietnam War to Operation Iraqi Freedom and Operation Enduring Freedom,hemorrhage remains the leading cause of combat death.The U.S.army has made great strides in research and development of hemorrhage control products and various tourniquets and hemostatic dressings have been fielded on the battlefield.This paper introduces current status of hemostatic products and hemorrhage control products.Currently,there are extremity tourniquets and junctional tourniquets.The hemostatic products include HemCon bandages,QuciClot granular and gauze,Celox gauze,XStat,etc.Meanwhile,the author summarizes three development trends of US military hemostatic products,ie,prehospital application of tourniquets,emphasis on hemorrhage control in junctional regions,and gauze hemostatic adjuncts preference.This review offers materials for fully understanding war wound treatment of U.S.army.

Resistencias y territorialidades Indígenas en el sur del Tolima / Indigenous Resistance and Territoriality in the Southern Region of the State of Tolima

Resumen Arqueológicamente se diagnostica las luchas indígenas por el territorio en el sur del Tolima; genealógicamente, se analizan formas de resistencia emergentes, especialmente, del «Gran Resguardo de Ortega y Chaparral¼, como prácticas y formas discursivas fundadas en reivindicaciones de Manuel Quintín Lame, que propiciaron la conformación de un movimiento social. Como metodologías, la arqueología describe y muestra lo efectivamente dicho por Quintín Lame y sus difusores; la genealogía permite análisis críticos, alternativos -no autorizados, ilegítimos- de múltiples fuerzas que atraviesan y tensionan los discursos, para visibilizar aquello que tendenciosamente se procura que no sea visto, por los implicados en el hecho.

Abstract Archaeologically, diagnosed indigenous struggles for territory in the south of Tolima are diagnosed; genealogically, emerging forms of resistance, especially, those of the "Great Ortega and Chaparral Indigenous Reservation," are analyzed as practices and discursive forms based on the claims of Manuel Quintin Lame, which encouraged the formation of a movement social. As methodologies, archaeology describes and shows what was actually said by Quintin Lame and their disseminators. Genealogy allows unauthorized, illegitimate critical, alternative, analyses- of multiple forces, which cross and strain speeches in order to make visible that which is tendentiously sought not to be seen, by those involved in the fact.

Analysis of cooperation networks in American military medical research institutes / 中华医学图书情报杂志

Objective To reveal the cooperation between American military medical research institutes by analyzing the scientific research cooperation networks in order to provide reference for domestic military medical research and its cooperation. Methods A co-occurrence matrix of high frequency research institutes was established by identif-ying the data using literature data analyzing tool TDA and analyzed by visualized tool Ucinet. Results The densely distributed academic cooperation networks in American military medical research institutes were characterized by small world properties and rapid internal knowledge flow with neither absolute knowledge barrier nor knowledge mo-nopolies. The number of co-authorship papers published by military medical research institutes was rather large and tended to increase year by year. The small size research institutes preferred to cooperate between each other. American military medical research institutes did not arbitrarily cooperate with high level research institutes and u-sually cooperated with the same kind of research institutes, including military medical universities, first class uni-versities, and top enterprises. Geo-factor was the most important factor for cooperation in research. Conclusion Frontier basic research, applied basic research, applied military and civilian research should encourage the exten-sive cooperation between military research institutes and excellent civilian research institutes by making full use of the geo-advantages of military medical research institutes. Administrative order and policies should be taken to pro-mote cooperation in military applied research field.