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]

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.
References in periodicals archive ?
In another development, Aminolhuda announced that a fund-raiser will be created to help Irfan Wafiy Idham Wazir, 12, who is suffering from Myokymia, a nerve-related illness.
In case of prolonged painful muscle cramps or myokymia, excessive sweating, pseudohypertrophy on examination, and findings of increased muscle enzymes; a diagnosis of Isaacs' syndrome should be considered.
Myokymia refers to muscle activity which appears rippling in nature.
The condition is also known as facial myokymia, and is sometimes misdiagnosed as cerebral palsy.
If spasm affects one group of fibers in the orbicularis oculi muscle, the diagnosis is probably ocular myokymia. If bilateral eyelid spasms are associated with twitching or spasms in one part of the face, the most accurate diagnosis is Meige syndrome or idiopathic cranial-cervical dystonia.
(1) With its nonspecific symptomatology, the differential diagnosis for hemifacial spasm is wide and includes facial tic, myokymia, blepharospasm, and tardive dyskinesia.
Based on her history and physical presentation, the differential diagnosis included psychogenic facial spasm, tardive dyskinesia, or oromandibular dystonia [2] with associated masticatory muscular pain, facial motor seizures, and hypocalcemic tetany: facial myokymia; Tourette syndrome; facial motor seizures.
The patient had multiple T2 lesions in at least 2 of 4 MS-typical regions of the CNS in addition to the myokymia. A diagnosis of multiple sclerosis was made.
These patients risk poor sleep, and a whole host of health problems--from eyelid myokymia and other ocular issues to poor cognition, cancer and diabetes--that are associated with poor and broken sleep.
Roth G, Magistris MG, 1987, Neuropathies with prolonged conduction block, single and grouped fasciculations, localized limb myokymia. Electroencephalogr Clin Neurophysiol 67: 428-438
Table 1: Key points for clinical diagnosis Myoclonus Brief, shocklike involuntary contraction of a muscle or group of muscles Dystonia Involuntary muscle contraction that can cause slow repetitive movements or abnormal postures Tremor Involuntary rhytmic contraction of antagonistic muscles Chorea Involuntary irregular movement that starts in one part of the body and moves unpredictably and continously to another part, like "dancing" Myokymia Involuntary spontaneous quivering, writhing movements within a single muscle not extensive enough to cause a movement of a joint