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Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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Visual velocity perception dysfunction in Parkinson's disease.

Matthew Bernardinis1, S Farokh Atashzar2, Mandar S Jog3

  • 1School of Biomedical Engineering, University of Western Ontario, 1151 Richmond Street North, London, Ontario N6A 5B9, Canada; Canadian Surgical Technologies & Advanced Robotics, 339 Windermere Road, London, Ontario N6A 5A5, Canada; London Movement Disorders Centre, 339 Windermere Road, London, Ontario N6A 5A5, Canada.

Behavioural Brain Research
|May 12, 2023
PubMed
Summary
This summary is machine-generated.

Visual perception is impaired in Parkinson's disease (PD), even in early stages. This visual deficit offers a potential new method for diagnosing and monitoring PD progression.

Keywords:
Computer-generated graphical toolNon-motor PD symptomsPD diagnostic technologyPD monitoring technologyParkinson’s disease (PD)Visual velocity perception

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Neurology

Background:

  • Sensory processing in Parkinson's disease (PD) is less understood than motor deficits.
  • Early sensory deficits in PD present opportunities for accessible diagnosis and monitoring.
  • Existing studies often confound sensory and motor aspects of PD.

Purpose of the Study:

  • To assess visual spatiotemporal perception independently of motor function in Parkinson's disease.
  • To develop and utilize a scalable computational tool for evaluating visual perception in PD.

Main Methods:

  • A 2-D virtual reality environment was employed to test visual perception.
  • A task measuring visual velocity perception was administered to 37 PD patients and 17 controls.

Main Results:

  • Parkinson's disease patients exhibited significant impairments in visual velocity perception.
  • These deficits were evident at slower velocity magnitudes and in early stages of PD.
  • Impairments were observed both with and without PD therapy (ON and OFF).

Conclusions:

  • Visual velocity perception is impaired in Parkinson's disease, indicating issues with visual spatiotemporal processing.
  • This visual deficit is sensitive to PD across all disease stages.
  • Visual perception assessment may serve as a valuable tool for PD diagnosis and monitoring.