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The role of visual information on obstacle circumvention during walking in people with Parkinson's Disease under and without dopaminergic medication effects

Grant number: 16/09805-0
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): August 01, 2016
Effective date (End): July 31, 2017
Field of knowledge:Health Sciences - Physical Education
Principal Investigator:Fabio Augusto Barbieri
Grantee:Pedro Henrique Alves de Paula
Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil


Visual information is essential during locomotion, especially in environments that present obstacles, which is similar our day by day. The sensory and perceptual processing are used to assess obstacles ahead during walking. Sensory and perceptual deficits have recently been identified in people with Parkinson's disease (PD), which have an important contribution to movement disorder. However, how sensory-perceptual function of the basal ganglia affects the control of movement, especially related to dopaminergic medication, have received little attention. The aim of this study is to investigate the role of visual information on circumvention an obstacle circumvention during walking in people with PD and neurologically healthy people. In addition, the influence of dopaminergic medication in sensory-motor integration in people with PD while circumvention an obstacle during walking will be studied. Fifteen people with PD and 15 neurologically healthy people will participate in the study. The participants will perform 5 trials of following conditions: walk without the presence of obstacles and walk with circumvention an obstacle positioned to 5 m, 3 m, 1.5 m and 0.8 m from the start point. We will analyze the visual parameters, the spatiotemporal parameters of walking, the center of mass, the feet positioning strategy related to obstacle and the personal space. People with PD and neurologically healthy people will carry out the tasks in two moments: "ON" and "OFF" state of dopaminergic medication, and before and after placebo ingestion, respectively. The parameters of interest will be compared by ANOVAs three-way (group x medication state x condition) with repeated measures for medication status and condition.

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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)
BARBIERI, FABIO AUGUSTO; POLASTRI, PAULA FAVARO; BUCKEN GOBBI, LILIAN TERESA; SIMIELI, LUCAS; ALOTA PEREIR, VINICIUS IGNACIO; BAPTIST, ANDRE MACARI; MORETTO, GABRIEL FELIPE; FIORELLI, CAROLINA MENEZES; ITIKAWA IMAIZUMI, LUIS FELIPE; RODRIGUES, SERGIO TOSI. Obstacle circumvention and eye coordination during walking to least and most affected side in people with Parkinson's disease. Behavioural Brain Research, v. 346, p. 105-114, . (14/20549-0, 16/09805-0, 15/15928-4)

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