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Visual Displacement Perception in Parkinson's Disease Analyzed Using a Computer-Generated Graphical Tool.

Matthew Bernardinis, Seyed Farokh Atashzar, Mandar Jog

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |November 17, 2018
    PubMed
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    Parkinson's disease (PD) impairs allocentric visual displacement perception, affecting object recognition and navigation. This visual deficit persists even with Levodopa treatment, indicating underlying processing pathway issues.

    Area of Science:

    • Neuroscience
    • Ophthalmology
    • Perception Science

    Background:

    • Parkinson's disease (PD) is characterized by motor deficits, but non-motor symptoms, including visual abnormalities, are prevalent.
    • Research on visual perception deficits in PD, particularly those not linked to motor responses, remains limited.

    Purpose of the Study:

    • To investigate allocentric visual displacement perception in individuals with Parkinson's disease.
    • To assess the impact of Levodopa therapy on visual displacement perception in PD patients.

    Main Methods:

    • A modular graphics toolbox was utilized for perceptual testing.
    • Participants included individuals with PD (both OFF and ON Levodopa) and age-matched healthy controls.

    Main Results:

    Related Experiment Videos

    • Individuals with PD demonstrated impaired visual displacement perception for larger magnitudes compared to controls.
    • These impairments were observed irrespective of Levodopa therapy status (OFF and ON).

    Conclusions:

    • Parkinson's disease affects visual displacement processing pathways, contributing to difficulties in visual recognition and visuospatial navigation.
    • The developed graphical tool is effective for quantifying perceptual abilities and can be extended to other modalities and robotic applications.