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Myoclonus

^ http://purl.obolibrary.org/obo/HP_0001336

Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements. [ HPO:probinson PMID:20589866 ]

Term info

database cross reference
  • UMLS:C0027066
  • SNOMEDCT_US:17450006
  • MSH:D009207
  • UMLS:C1854302
  • SNOMEDCT_US:127324008
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.

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 exact synonym

Myoclonic jerks

has related synonym

Involuntary jerking movements

id

HP:0001336