To produce hand's movement directed towards a target, the investigator must combine several sensory information, such as vision or proprioception. The posterior parietal cortex (PPC) is a region of the cortex involved in this multisensory integration. A lesion of the PPC cause a visuo-motor trouble called optic ataxia but these patients also have perceptual troubles. The aim of the study is to understand the different functions of the PPC and especially how the processes of spatial coding of the sensory information influences perception and motor planning. In this study, the investigator want to explore the sensory motor and the perceptual performance of patients with optic ataxia compared with healthy subjects, using 6 behavioral tests. Objectify the consequences of PPC impairment (visual-motor and perceptual consequences) on patients' quality of life and autonomy.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
160
In the experiences 1 and 2, the participant needs to point different visual targets (LED) in the dark.
In the experience 3, a tactile stimulation is applied to the middle finger of the 2 hands. The participant needs to indicate into a microphone when he feels the stimulation.
Target dots or visual images are presented on a computer screen. The participant is required to point to the targets or to react as soon as possible by pressing a response button when they are detected.
U1028 INSERM - CNRS UMR 5292 Equipe ImpAct
Bron, France
RECRUITINGresponse error - number of pointing error
Time frame: Day 0 after each stimulation
response error -measure of reaction times
Time frame: Day 0 after each stimulation
response error - percentage of right responses
Time frame: Day 0 after each stimulation
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.