title: Segmental action and stimuli-sensitive myoclonus with acute onset. A case report.
abstract: A 23-year old man developed action and stimulus-sensitive myoclonus involving neck and proximal arm muscles. The finding of abnormally long and tortuous vertebral and carotid arteries and the abrupt onset of symptomatology suggest a possible hemodynamic mechanism. The electrophysiological characters and the sensitivity to serotonin precursors are consistent with the definition of "reticular reflex myoclonus".
mesh_terms: D006916:5-Hydroxytryptophan / Q000627:therapeutic use; D000208:Acute Disease; D000328:Adult; D000792:Angiography; D002230:Carbidopa / Q000627:therapeutic use; D002339:Carotid Arteries / Q000002:abnormalities; D002560:Cerebrovascular Circulation; D002998:Clonazepam / Q000627:therapeutic use; D003975:Diazepam / Q000627:therapeutic use; D004558:Electric Stimulation; D004569:Electroencephalography; D006801:Humans; D008297:Male; D009207:Myoclonus / Q000188:drug therapy / Q000503:physiopathology*; D014711:Vertebral Artery / Q000002:abnormalities
chemical_list: D002998:Clonazepam; D006916:5-Hydroxytryptophan; D002230:Carbidopa; D003975:Diazepam