Attentional grasp in Parkinson disease
Valeria Drago1, Paul S Foster, Frank M Skidmore
1Department of Neurology, University of Florida College of Medicine, Gainesville, FL, USA. valeria.drago@neurology.ufl.edu
Summary
Patients with Parkinson disease (PD) struggle with attention allocation, particularly when voluntarily shifting focus. This study found PD patients have difficulty disengaging attention, potentially linked to frontal-executive dysfunction.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurology
Background:
- Parkinson disease (PD) is associated with neurotransmitter system deficits impacting attention.
- Understanding how PD affects spatial attention allocation is crucial.
Purpose of the Study:
- To investigate the influence of Parkinson disease on the spatial allocation of both reactive (bottom-up) and volitional (top-down) attention.
- To identify specific attentional deficits in PD patients.
Main Methods:
- Utilized the line bisection task to assess spatial attention.
- Manipulated conditions to evaluate bottom-up attention (presence/absence of blinking lights) and top-down attention (naming light color before bisection).
- Compared attention allocation in Parkinson disease patients and normal control subjects.
Main Results:
- In the bottom-up attention condition, Parkinson disease patients did not show abnormal distraction compared to controls.
- In the top-down attention condition, stimuli on the right side of the line influenced attention allocation in Parkinson disease subjects.
- Parkinson disease patients exhibited difficulties in disengaging or reallocating attention when voluntarily directing it rightward.
Conclusions:
- Parkinson disease patients experience challenges in disengaging and reallocating attention, especially in top-down tasks.
- This attention disengagement deficit may be linked to the frontal-executive dysfunction characteristic of Parkinson disease.
- Findings highlight specific attentional control impairments in Parkinson disease relevant to daily functioning.
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