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Warm-Up of Myotonia in Myotonia Congenita

Legend: Video demonstrates the characteristic reduction in myotonia, or warm-up, with repetitive hand grips seen in patients with myotonia congenita. The patient is instructed to squeeze his hand closed as tightly as he can and then open his hand quickly. This maneuver is repeated to evaluate for warm-up of myotonia or paradoxical worsening.

Duration: 0:46

Associated with: CONTINUUM: Lifelong Learning in Neurology. 19(6):1598-1614, December 2013

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