Age-related differences in EEG beta activity during an assessment of ankle proprioception

Autor(es)

Toledo, Diana R. ^{[1, 2]} ; Barela, Jose A. ^{[3, 4]} ; Manzano, Gilberto M. ^[5] ; Kohn, Andre F. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, EPUSP, PTC, Biomed Engn Lab, Sao Paulo - Brazil

^[2] Univ Sao Paulo, EPUSP, PTC, Neurosci Program, Sao Paulo - Brazil

^[3] Univ Cruzeiro Sul, Inst Phys Act & Sport Sci, Sao Paulo - Brazil

^[4] Sao Paulo State Univ, Inst Biosci, Rio Claro - Brazil

^[5] Univ Fed Sao Paulo, Div Neurol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Neuroscience Letters; v. 622, p. 1-5, MAY 27 2016.
• Citações Web of Science: 3

Resumo

The aim of this work was to compare cortical beta oscillatory activity between young (YA) and older (OA) adults during the assessment of ankle proprioception. We analyzed the response time (RT) to kinesthetic perception and beta event-related desynchronization/synchronization (ERD/ERS) in response to passive ankle movement applied at a slow speed, 0.5 degrees/s. The relationship between ERD/ERS and RT was investigated by classifying the signals into fast-, medium-, and slow-RT. The results showed a temporal relationship between beta oscillation changes and RT for both groups, i.e., earlier ERD and ERS were obtained for trials with faster response time. ERD was larger and delayed in OA compared to the YA, and beta ERS was present only for OA. These findings suggest that a less efficient proprioceptive signaling reaching the brain of OA requires a higher level of brain processing and hence the differences in ERD potentials between YA and OA. Furthermore, the occurrence of ERS in OA might represent a compensatory strategy of active cortical resetting for adequate sensorimotor behavior due to the age-related reduced peripheral input and neuromuscular impairments. Altered balance between excitatory and inhibitory intracortical activity in older adults presumably explains the changes in beta oscillations. (C) 2016 Elsevier Ireland Ltd. All rights reserved. (AU)

• Processo FAPESP: 09/09286-9 - Envolvimento do sistema nervoso central na resposta à percepção cinestésica de idosos e sua relação com o controle postural
• Beneficiário: Diana Rezende de Toledo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/11300-8 - Treino de força dinâmica de tornozelo associado à estimulação elétrica subliminar: adaptações corticais e medulares e efeitos no controle postural
• Beneficiário: Diana Rezende de Toledo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 11/17193-0 - Respostas reflexas, encefálicas e comportamentais a estímulos mecânicos e elétricos no estudo da propriocepção e da medula espinhal em seres humanos
• Beneficiário: André Fábio Kohn
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/14667-7 - Influência do tipo de tarefa e da intensidade de contração muscular na coerência corticomuscular no controle da articulação do tornozelo.
• Beneficiário: Diana Rezende de Toledo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado