doi: 10.1016/0022-510x(83)90135-1.
Quantitative testing of handgrip strength, myotonia, and fatigue in myotonic dystrophy
- PMID: 6875612
- DOI: 10.1016/0022-510x(83)90135-1
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Quantitative testing of handgrip strength, myotonia, and fatigue in myotonic dystrophy
J Neurol Sci.
1983 Jul.
Abstract
An electrically calibrated, isometric hand dynamometer was used to quantitate maximum voluntary contraction (MVC(, relaxation time and fatigue time (at 50% MVC) in 18 normal and 10 myotonic dystrophy subjects. Precise measurements of MVC and fatigue time were obtained in normals and myotonic dystrophy patients. Relaxation times were markedly prolonged and were quite variable in all patients with myotonic dystrophy in contrast to the highly reproducible times in normals. Neither "warm-up" activity nor acetazolamide treatment altered relaxation time.
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