kymatism

kymatism

 [ki´mah-tizm] myokymia; quivering of muscles.

my·o·ky·mi·a

(mī'ō-kī'mē-ă) Continuous involuntary quivering or rippling of muscles at rest, caused by spontaneous, repetitive firing of groups of motor unit potentials.
Synonym(s): kymatism, Morvan chorea. [myo- + G. kyma, wave]