loading...| Preferred Name | Myoclonus | |
| Synonyms |
Involuntary jerking movements Jerking Myoclonic jerks |
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| Definitions |
Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements. Myoclonus may be synchronous (several muscle contracting simultaneously), spreading (several muscles contracting in sequence), or asynchronous (several muscles contracting with varying and unpredictable relative timing). Myoclonus is characterized by sudden unidirectional movement due to muscle contraction (positive myoclonus) or due to sudden brief muscle relaxation (negative myoclonus). Electrophysiological tests are very helpful in determining whether myoclonus is cortical, subcortical or spinal. |
|
| ID |
http://purl.obolibrary.org/obo/HP_0001336 |
|
| comment |
Myoclonus may be synchronous (several muscle contracting simultaneously), spreading (several muscles contracting in sequence), or asynchronous (several muscles contracting with varying and unpredictable relative timing). Myoclonus is characterized by sudden unidirectional movement due to muscle contraction (positive myoclonus) or due to sudden brief muscle relaxation (negative myoclonus). Electrophysiological tests are very helpful in determining whether myoclonus is cortical, subcortical or spinal. |
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| database_cross_reference |
UMLS:C0027066 SNOMEDCT_US:127324008 UMLS:C1854302 SNOMEDCT_US:17450006 |
|
| definition |
Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements. |
|
| has_alternative_id |
HP:0002535 HP:0007087 |
|
| has_broad_synonym |
Jerking |
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| has_exact_synonym |
Myoclonic jerks |
|
| has_related_synonym |
Involuntary jerking movements |
|
| id |
HP:0001336 |
|
| label |
Myoclonus |
|
| notation |
HP:0001336 |
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| preferred label |
Myoclonus |
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| prefLabel |
Myoclonus |
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| subClassOf |