Hyperekplexia exacerbated by occlusion of posterior thalamic arteries

Arch Neurol. 1983 Apr;40(4):244-6. doi: 10.1001/archneur.1983.04050040074014.


A 65-year-old man with the onset of hyperekplexia at 37 years of age experienced resolution of the illness at the age of 45 years. Twenty years later after a posterior thalamoperforate artery occlusion that produced a "rubral tremor," severe hyperekplexia redeveloped. The patient's symptoms were controlled with clonazepam, except for brief periods. Interruption of the rubrothalamic pathways or neuronal aggregates at the level of the red nucleus seemed to disinhibit the startle reflex.

Publication types

  • Case Reports

MeSH terms

  • Acute Disease
  • Adult
  • Aged
  • Arterial Occlusive Diseases / complications*
  • Follow-Up Studies
  • Humans
  • Male
  • Middle Aged
  • Recurrence
  • Reflex, Abnormal / etiology*
  • Reflex, Startle*
  • Thalamus / blood supply*
  • Tremor / etiology