Haptic Perception of Object Curvature in Parkinson's Disease
Author Information
Author(s): Jürgen Konczak, Kuan-yi Li, Paul J. Tuite, Howard Poizner
Primary Institution: University of Minnesota
Hypothesis
Do PD patients have decreased sensitivity to detect the curvature of their own hand paths when they cannot rely on vision?
Conclusion
The study found that Parkinson's disease is associated with a decreased acuity of the haptic sense, which may occur already at an early stage of the disease.
Supporting Evidence
- 82% of PD patients showed elevated thresholds for detecting convex curvatures.
- The median threshold for the PD group was increased by 343% compared to the control group.
- Curvature sensitivity was not improved during active exploration in either group.
Takeaway
People with Parkinson's disease have a harder time feeling the curves of objects with their hands, which can make it difficult for them to move things properly.
Methodology
The study involved 11 patients with mild to moderate Parkinson's disease and 8 healthy controls who judged the curvature of a virtual box using a robotic manipulandum under active and passive conditions.
Potential Biases
Potential bias due to the small sample size and the specific demographic of participants.
Limitations
The study had a small sample size and did not examine the effects of medication on haptic perception in detail.
Participant Demographics
11 patients with Parkinson's disease (ages 48-70, 4 females, 7 males) and 8 age-matched healthy controls (ages 50-76, 1 female, 7 males).
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website