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Postural responses to extrinsic perturbation and sensory constraint post-stroke: effect of additional tactile information


Balance impairment is the major cause of disability in individuals after stroke. Individuals who have suffered a stroke begin to compensate the sensory systems in the performance of daily tasks. Tactile extra information by light touching on a vibratory surface has been shown to induce a significant reduction of postural sway in healthy individuals. The purpose of this project is to evaluate the effect of additional information provided by light touching at a vibratory surface on balance recovery under different conditions of sensory restriction and mechanical perturbation in individuals who have suffered a stroke. In addition, postural responses will be evaluated as a function of hemisphere injured. Participants will be divided into two groups: 1) control group of healthy individuals, and 2) experimental group of individuals after stroke with lesions to the right or to the left cerebral hemisphere. Both groups will be evaluated in the following experimental conditions: a) sensory restriction, with manipulation of visual and tactile information; and b) mechanical perturbation, with translation of the support base in the anteroposterior direction. These experimental conditions will be evaluated contrasting light touching versus no touch on a vibratory surface. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MARTINELLI, ALESSANDRA REZENDE; COELHO, DANIEL BOARI; TEIXEIRA, LUIS AUGUSTO. Light touch leads to increased stability in quiet and perturbed balance: Equivalent effects between post-stroke and healthy older individuals. HUMAN MOVEMENT SCIENCE, v. 58, p. 268-278, APR 2018. Web of Science Citations: 1.
MARTINELLI, ALESSANDRA REZENDE; COELHO, DANIEL BOARI; MAGALHAES, FERNANDO HENRIQUE; KOHN, ANDRE FABIO; TEIXEIRA, LUIS AUGUSTO. Light touch modulates balance recovery following perturbation: from fast response to stance restabilization. Experimental Brain Research, v. 233, n. 5, p. 1399-1408, MAY 2015. Web of Science Citations: 7.

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