Effects of Sensory Deficit on Phalanx Force Deviation During Power Grip Post Stroke.
The effect of sensory deficits on power grip force from individual phalanges was examined. The authors found that stroke survivors with sensory deficits (determined by the Semmes-Weinstein monofilament test) gripped with phalanx force directed more tangential to the object surface, than those without, although both groups had similar motor deficits (Chedoke-McMaster and Fugl-Meyer), grip strength, and skin friction. Altered grip force direction elevates risk of finger slippage against the object thus grip loss/object dropping, hindering activities of daily living. Altered grip force direction was associated with altered muscle activation patterns. In summary, the motor impairment level alone may not describe hand motor control in detail. Information about sensory deficits helps elucidate patients' hand motor control with functional relevance.
a Department of Industrial and Manufacturing Engineering , University of Wisconsin-Milwaukee.
Leah R
LR
Enders
b Division of Occupational Therapy , Department of Health Professions, Department of Health Sciences and Research , Medical University of South Carolina , Charleston.
Na Jin
NJ
Seo
D016022:Case-Control Studies; D005260:Female; D005385:Fingers / Q000502:physiology*; D018737:Hand Strength / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012678:Sensation Disorders / Q000150:complications / Q000503:physiopathology*; D020521:Stroke / Q000150:complications / Q000503:physiopathology*
EMG; hand; power grip; sensory deficit; stroke