myokymia

(redirected from Morvan chorea)

myokymia

 [mi″o-ki´me-ah]
a benign condition in which there is persistent quivering of the muscles.

my·o·ky·mi·a

(mī'ō-kī'mē-ă), [MIM*160100]
Continuous involuntary quivering or rippling of muscles at rest, caused by spontaneous, repetitive firing of groups of motor unit potentials.
[myo- + G. kyma, wave]

myokymia

/myo·kym·ia/ (-ki´me-ah)
1. a benign condition marked by brief spontaneous tetanic contractions of motor units or groups of muscle fibers, usually adjacent groups of fibers contracting alternately.
2. myoky´mic

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]

myokymia

One of a range of conditions featuring involuntary, fine, twitching or rippling of muscle fibres. The common eyelid twitch, or fasciculation, is an example of myokymia.

Morvan,

Augustin Marie, French physician, 1819-1897.
Morvan chorea - continuous involuntary quivering of muscles at rest. Synonym(s): myokymia
Morvan disease - the presence of longitudinal cavities in the spinal cord. Synonym(s): Morvan syndrome; syringomyelia
Morvan syndrome - Synonym(s): Morvan disease

myokymia

Twitching of a few bundles of fibres of the eyelid muscle. It occurs most commonly when fatigued, sometimes on exposure to cold, and in some pathological cases (e.g. multiple sclerosis) in which case the entire muscle is involved. Superior oblique myokymia can often be diagnosed by noting fine torsional nystagmus of the affected eye on slit-lamp examination. In cases where no nystagmus is noted, a patient's history of monocular episodic oscillopsia, associated with vertical diplopia, may be sufficient to make a diagnosis. The use of carbamazepine or propranolol has been suggested as possible treatments in stopping the myokymia. See orbicularis muscle; multiple sclerosis.

myokymia

a benign condition in which there is persistent quivering of the muscles.