The visual kinetic depth effect is altered with Parkinson's disease
K D White1, F M Skidmore2, J Hammond2
1Department of Psychology, University of Florida, Gainesville, FL, 32611, USA; Brain Rehabilitation Research Center, Malcom Randall VA Medical Center, Gainesville, FL, 32608, USA.
Parkinsonism & Related Disorders
|February 8, 2017
Summary
Patients with Parkinson's disease (PD) show deficits in 3D visual perception, struggling to integrate moving images. This impairment in spatio-temporal integration may affect real-world tasks like driving.
Area of Science:
- Neuroscience
- Perception Science
Background:
- Parkinson's disease (PD) is frequently associated with visual-perceptual disorders.
- Understanding these deficits is crucial for patient safety and quality of life.
Purpose of the Study:
- To investigate if individuals with Parkinson's disease can develop a three-dimensional (3D) percept reliant on the kinetic depth effect.
- To assess the ability to integrate time-varying, multi-trajectory moving images.
Main Methods:
- Sixteen Parkinson's disease patients and 12 healthy controls were tested.
- Participants viewed stimuli of moving dots simulating rotating spheres (Training and Test conditions).
Main Results:
- All participants perceived the Training stimuli as a rotating ball.
- Parkinson's disease patients were significantly less likely than controls to perceive the Test stimuli as a 3D "ball", with seven reporting it as "flat".
Conclusions:
- Some Parkinson's disease patients exhibit impaired spatio-temporal integration of bidirectional visual motion.
- The underlying mechanisms and reasons for this deficit in only some patients require further investigation.
- Impaired 3D perception in moving scenes may contribute to accidents, particularly for drivers.
Keywords:
DisengagementGlobal attentionKinetic depth effectParkinson's diseaseStructure from motionVisual perceptionWorking memoryMore Related Videos
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