myokymia


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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.
References in periodicals archive ?
Other symptoms associated with the disorder include pseudomyotonia (delayed muscle relaxation after contraction) and myokymia.
44) Myokymia, or arrhythmic rippling of muscles (see later), is an unusual side effect of gold salt therapy.
Genes associated with potassium channelopathies in humans Channelopathies Genes involved Anderson--Tawil syndrome KCNJ2 Episodic ataxia with myokymia type 1 KCNA1 Long QT syndrome type 1 KVLQT1 Long QT syndrome type 2 HERG Long QT syndrome type 5 MINK Long QT syndrome type 7 KCNJ2 Familial hyperinsulinemia of infancy KCNJ11, ABCC8 Source: Refs 22, 32
It is important to distinguish this process from other types of facial spasm, such as psychogenic facial spasm, facial tic, facial myokymia, blepharospasm, and tardive dyskinesia.
Officially called blepharospasm or myokymia, its unofficial name is slapped cheek syndrome, because people get the wrong impression when you're sitting on a bar stool sipping cocktails.