Precueing time but not direction of postural perturbation induces early muscular activation: Comparison between young and elderly individuals

Autor(es)

Silva, Marina Brito ^[1] ; Coelho, Daniel Boari ^[1] ; de Lima-Pardini, Andrea Cristina ^[2] ; Martinelli, Alessandra Rezende ^[1] ; Baptista, Thais da Silva ^[1] ; Ramos, Renato Teodoro ^[3] ; Teixeira, Luis Augusto ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Phys Educ & Sport, Human Motor Syst Lab, BR-05508030 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Fac Med, Inst Radiol, LIM44, BR-5403900 Sao Paulo, SP - Brazil

^[3] Univ Sao Paulo, Fac Med, Dept Psychiat, BR-5403010 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Neuroscience Letters; v. 588, p. 190-195, FEB 19 2015.
• Citações Web of Science: 5

Resumo

In this study, we evaluated the effect of precueing characteristics of an impending perturbation to upright stance on reactive responses of distal leg muscles. Young and older individuals were compared in a task of recovering stable upright stance following rotation of the supporting platform to induce anterior or posterior body sway. Directions of the supporting platform rotation were randomized across trials. Immediately before postural perturbation participants were cued about direction and/or time of platform rotation, or performed the task under directional and temporal uncertainty of the impending perturbation. Results showed that precueing time of perturbation led to earlier muscular activation onset, while precueing perturbation direction did not modulate either latency or magnitude of muscular activation. Those effects were similar between age groups. Our findings suggest that awareness of the perturbation time favored shorter response latencies in both the young and older individuals. (C) 2015 Elsevier Ireland Ltd. All rights reserved. (AU)

• Processo FAPESP: 11/23306-2 - Organização central na geração de ajustes posturais antecipatórios e reativos em idosos
• Beneficiário: Thais da Silva Baptista
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 10/00307-0 - Organização central na geração de ajustes posturais antecipatórios e reativos em idosos
• Beneficiário: Marina Brito Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado