ABE RAVIN, M.D.; JAMES J. WARING, M.D., F.A.C.P.
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After grasping an object with great force, a normal person is occasionally conscious of a little difficulty in relaxation. Because this difficulty is slight and occurs only under unusual circumstances, it is in no way disabling and therefore scarcely noticeable. As a result of an inherited defect, other persons are unable to relax their muscles rapidly after contractions of ordinary strength. Under these conditions the muscles remain contracted for some time after the effort to contract them has ceased. Because the contraction persists during what is normally the phase of relaxation, the difficulty appears as a slowness in relaxation. This
RAVIN A, WARING JJ. STUDIES IN DYSTROPHIA MYOTONICA. IV. MYOTONIA: ITS NATURE AND OCCURRENCE1. Ann Intern Med. 1940;13:1174–1183. doi: 10.7326/0003-4819-13-7-1174
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Published: Ann Intern Med. 1940;13(7):1174-1183.
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