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Objective evaluation of a splint designed to reduce hypertonicity

J J McPherson

    The American Journal of Occupational Therapy : Official Publication of the American Occupational Therapy Association
    |March 1, 1981
    PubMed
    Summary
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    Snook's spasticity reduction splint effectively measured hypertonus and reduced passive muscle tone in handicapped individuals. The reduction in spasticity correlated with splint wear duration, though effects were not permanent.

    Area of Science:

    • Neuroscience
    • Rehabilitation Medicine
    • Occupational Therapy

    Background:

    • Hypertonicity, a condition characterized by increased muscle tone, significantly impacts individuals with severe handicaps.
    • Spasticity can impede motor function and daily activities, necessitating effective management strategies.

    Purpose of the Study:

    • To objectively evaluate the efficacy of Snook's spasticity reduction splint in managing wrist flexor hypertonus.
    • To determine the relationship between splint wear duration and the reduction in passive muscle tone.

    Main Methods:

    • Utilized a spring-weighted scale to measure the force of spastic wrist flexors in five severely and profoundly handicapped subjects.
    • Assessed changes in passive muscle tone associated with the use of the custom-designed splint.

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    Main Results:

    • The developed splint proved effective in quantifying hypertonus.
    • Splint application led to a measurable reduction in the passive component of muscle tone.
    • The degree of spasticity reduction was directly related to the duration of splint usage.

    Conclusions:

    • Snook's spasticity reduction splint is a valuable tool for measuring and managing hypertonicity.
    • Occupational therapists can utilize splinting as an intervention to decrease passive muscle tone, with duration of use being a key factor.
    • The study highlights that the therapeutic effects of splinting may not be permanent, suggesting the need for ongoing management strategies.