Aging increases flexibility of postural reactive responses based on constraints imposed by a manual task

Autor(es)

de Lima-Pardini, Andrea Cristina ^[1] ; Coelho, Daniel Boari ^[2] ; Silva, Marina Brito ^[2] ; Azzi, Nametala Maia ^[2] ; Martinelli, Alessandra Rezende ^[2] ; Horak, Fay Bahling ^{[3, 4]} ; Teixeira, Luis Augusto ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Med, Inst Radiol, Lab Med Invest LIM44, BR-05403900 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sch Phys Educ & Sport, Dept Human Movement Biodynam, Human Motor Syst Lab, BR-05403900 Sao Paulo - Brazil

^[3] Oregon Hlth & Sci Univ, Portland VA Med Ctr, Portland, OR 97201 - USA

^[4] Oregon Hlth & Sci Univ, Sch Med, Dept Neurol, Balance Disorders Lab, Portland, OR 97201 - USA

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN AGING NEUROSCIENCE; v. 6, DEC 3 2014.
• Citações Web of Science: 8

Resumo

This study compared the effect of stability constraints imposed by a manual task on the adaptation of postural responses between 16 healthy elderly (7.38) and 16 healthy young (mean age = 22.94 years, SD = 4.82) individuals. Postural stability was perturbed through unexpected release of a load attached to the participant's trunk while performing two versions of a voluntary task: holding a tray with a cylinder placed with its flat side down (low constraint) or with its rolling round side down (high constraint). Low and high constraint tasks were performed in alternate blocks of trials. Results showed that young participants adapted muscular activation and kinematics of postural responses in association with previous experience with the first block of manual task constraint, whereas the elderly modulated postural responses based on the current manual constraint. This study provides evidence for flexibility of postural strategies in the elderly to deal with constraints imposed by a manual task. (AU)

• Processo FAPESP: 09/11319-2 - Integração entre controle postural e supra-postural em situações de perturbação do equilíbrio corporal em indivíduos idosos
• Beneficiário: Luis Augusto Teixeira
• Modalidade de apoio: Auxílio à Pesquisa - Regular