Trismus caused by paradoxical activity of jaw-closing muscles in brain stem tuberculoma

Oral Surg Oral Med Oral Pathol. 1988 Jun;65(6):675-8. doi: 10.1016/0030-4220(88)90007-2.


An ipsilateral trismus of jaw-closing muscles during jaw opening is reported in a patient with brain stem tuberculoma. This condition is only superficially simulated by spasticity or tetanus. The decisively differentiating clinical and electromyographic features and the possible pathophysiologic mechanism underlying such trismus are discussed.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Brain Diseases / complications
  • Brain Diseases / physiopathology
  • Brain Stem*
  • Electromyography
  • Female
  • Follow-Up Studies
  • Humans
  • Masticatory Muscles / innervation
  • Masticatory Muscles / physiopathology
  • Muscle Contraction
  • Trismus / etiology*
  • Trismus / physiopathology
  • Tuberculoma / complications*