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Using touch or imagined touch to compensate for loss of proprioception: a case study
Jennifer A Stevens1, Whitney G Cole, Peter M Vishton
1Psychology Department, The College of William and Mary, Williamsburg, VA 23187-8795, USA. jastev@wm.edu
Neurocase
|October 27, 2011
Summary
Proprioceptive loss after stroke can be temporarily improved by touching the impaired limb. Even imagined touch by the other limb helped restore the body
Area of Science:
- Neuroscience
- Human motor control
- Somatosensation
Background:
- Proprioception, the sense of body position, is crucial for motor control.
- Stroke can lead to sensory deficits, including proprioceptive loss in affected limbs.
Observation:
- A stroke patient with unilateral limb proprioceptive loss reported temporary restoration of the sense via tactile stimulation of the impaired limb.
- This effect was also explored using imagined touch from the unimpaired limb.
Findings:
- Actual touch and imagined touch by the unimpaired limb significantly reduced movement errors and jerk in the impaired limb.
- The benefits were most pronounced for targets within the bilateral reach space of both hands.
Implications:
- Tactile feedback, even when imagined, may offer a compensatory mechanism for proprioceptive deficits.
- This suggests potential non-invasive therapeutic strategies for motor rehabilitation after neurological injury.
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