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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 7
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: Neuroscience Letters; v. 588, p. 190-195, FEB 19 2015.
Web of Science Citations: 5
Abstract

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)

FAPESP's process: 11/23306-2 - Central organization in the production of anticipatory and reactive postural adjustments
Grantee:Thais da Silva Baptista
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 10/00307-0 - Central organization in the generation of anticipatory and reactive postural adjustments in the elderly
Grantee:Marina Brito Silva
Support Opportunities: Scholarships in Brazil - Doctorate