loading...| Preferred Name |
Myoclonus |
| Synonyms |
Myoclonic jerks Involuntary jerking movements Jerking |
| Definitions |
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. Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements. |
| 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. |
| database_cross_reference |
SNOMEDCT_US:17450006 MSH:D009207 SNOMEDCT_US:127324008 UMLS:C1854302 UMLS:C0027066 |
| definition |
Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements. |
| has_alternative_id |
HP:0007087 HP:0002535 |
| has_broad_synonym |
Jerking |
| has_exact_synonym |
Myoclonic jerks |
| has_obo_namespace |
human_phenotype |
| has_related_synonym |
Involuntary jerking movements |
| id |
HP:0001336 |
| label |
Myoclonus |
| notation |
HP:0001336 |
| prefLabel |
Myoclonus |
| treeView | |
| subClassOf |