The independence of impairments in proprioception and visuomotor adaptation after stroke.
Robert T Moore, Mark A Piitz, Nishita Singh and 2 others
PMID 38762552WHAT IT FOUND
Stroke survivors with impaired position sense still adapted to visual distortions at normal rates.
Proprioceptive deficits and visuomotor adaptation impairments occur independently, so a patient’s poor body awareness does not predict their ability to learn from visual feedback.
Key findings
01Impairments in position sense (APM task) were statistically independent from impairments in visuomotor adaptation.
02Impairments in kinesthetic sense (AMM task) were statistically independent from impairments in visuomotor adaptation.
03Clinical proprioceptive deficits measured by the Thumb Localization Test were independent from impairments in visuomotor adaptation.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study is cross-sectional, so it cannot track how these relationships change over time during recovery. Visuomotor adaptation is a short-term learning process and may not reflect long-term motor skill acquisition used in clinical therapy. The robotic tasks required mirroring the affected arm with the unaffected arm, which relies on interhemispheric communication and may not isolate proprioception perfectly.
Declared interests
The study was funded by the Canadian Institutes of Health Research. The authors declared no competing interests.
The easy way to misread this
Do not interpret the lack of correlation as evidence that proprioceptive impairments are irrelevant to motor recovery. The study shows these specific deficits do not predict the ability to adapt to visual distortions in the short term, but they may still impact other aspects of motor control or long-term learning.