Essential myoclonus tends to be stable without increasing in severity over time.
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Rarely does myoclonus indicate anything other than arbitrary muscle contraction.
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Studies suggest that several locations in the brain are involved in myoclonus.
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Treatment of myoclonus focuses on medications that may help reduce symptoms.
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The specific mechanisms underlying myoclonus are not yet fully understood.
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Prolonged oxygen deprivation to the brain, hypoxia, may result in posthypoxic myoclonus.
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Anatomically, myoclonus may originate from lesions of the cortex, subcortex or spinal cord.
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Laboratory studies suggest that an imbalance between these chemicals may underlie myoclonus.
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Some persons with sleep myoclonus are rarely troubled by, or need treatment for, the condition.
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More examples
A clonic spasm of a muscle or muscle group
(Myoclonic) repetitive contraction of muscles; occurs in infantile spasms.
(myoclonic) seizures seizures that cause sudden jerks or twitches, especially in the upper body, arms, or legs.
Involuntary, sharp, jerking muscular contractions, often painful.
Jerking, involuntary movements of the arms and legs; may occur normally during sleep.
Very brief, involuntary, random muscular contractions. Myoclus can occur spontaneously at rest, in response to sensory stimuli, or with voluntary movements.
Usually generalized seizures causing massive rapid clonic spasms of muscle or group of muscles.
Muscle contractions in the form of "jerks" or twitches.
Violent, uncontrollable contractions of the muscles, either localized or occurring throughout the body.