Myoclonus (redirected from Myoclonis)

myoclonus /my·oc·lo·nus/ (mi-ok´lo-nus) shocklike contractions of a muscle or a group of muscles.myoclon´ic

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essential myoclonus  myoclonus of unknown etiology, involving one or more muscles and elicited by excitement or an attempt at voluntary movement.

intention myoclonus  that occurring when voluntary muscle movement is initiated.

nocturnal myoclonus  nonpathological myoclonic jerks occurring as a person is falling asleep or is asleep.

palatal myoclonus  rapid rhythmic, up-and-down movement of one or both sides of the palate, often with ipsilateral synchronous clonic movements of the face, tongue, pharynx, and diaphragm muscles.

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my·oc·lo·nus (m-kl-ns)

n.

A sudden shocklike twitching of muscles or parts of muscles without any rhythm or pattern, occurring in various brain disorders.

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myo·clonic (m-klnk) adj.

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Myoclonus

Involuntary contractions of a muscle or group of muscles.

Mentioned in: Anoxia

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myoclonus,

n a spasm of muscle or group of muscles.

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myoclonus

repetitive, rhythmic contractions of a group of skeletal muscles, persisting in sleep. The result of encephalitis or myelitis caused by distemper virus in dogs. Called also canine chorea, flexor spasm and tremor syndrome.

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familial reflex myoclonus

a familial disease seen in young Labrador retriever puppies; myoclonus is followed by a generalized extensor rigidity and opisthotonos.

inherited congenital myoclonus

inherited as a recessive trait in Polled Hereford cattle; at birth affected calves are unable to stand because of myoclonic jerks to skeletal muscles in response to external stimuli; affected calves are not viable. One of the diseases originally classified together as neuraxial edema.

palatal myoclonus

a condition characterized by a rapid rhythmic movement of one or both sides of the palate.