Sensori-motor and Perceptual Functions of the PPC. (PPCfonctions)

  • End date
    Feb 22, 2029
  • participants needed
  • sponsor
    Hospices Civils de Lyon
Updated on 26 February 2022
Accepts healthy volunteers


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.

Condition Healthy Volunteers, Optic Ataxia
Treatment point targets, tactile stimulation, visual images
Clinical Study IdentifierNCT03286686
SponsorHospices Civils de Lyon
Last Modified on26 February 2022


Yes No Not Sure

Inclusion Criteria

All patients and healthy subjects
male and female, age from 18 to 75 years included
normal vision or corrected vision
covered by social security
signed written informed consent
neurological injury in posterior parietal cortex supported by a cerebral MRI
present optic ataxia symptoms Healthy subjects
no known neurological injury

Exclusion Criteria

unable to comply with the tasks (neurological, psychiatric, sensory or motor troubles)
Clear my responses

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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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