Unusual pattern of somatosensory and brain-stem auditory evoked potentials after cardio-respiratory arrest

Electroencephalogr Clin Neurophysiol. 1985 Sep;62(5):338-42. doi: 10.1016/0168-5597(85)90042-5.


Two patients in coma after cardio-pulmonary arrest showed bilateral absence of all brain-stem auditory evoked potentials contrasting with normal brain-stem reflexes and normal somatosensory cortical evoked potentials. In both patients pre-existing dysfunction of peripheral auditory structures could be ruled out. Subsequent neuropathological analysis showed that the anoxic-ischaemic lesions were restricted to Sommer's sector and the Purkinje cells. These unusual data suggest the hypothesis that a severe hypoxic-ischaemic insult may impair cochlear function and interfere with the activation of the intact auditory pathways.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Auditory Cortex / physiopathology
  • Brain Diseases / etiology
  • Brain Diseases / physiopathology*
  • Brain Stem / physiopathology*
  • Cochlea
  • Coma / physiopathology
  • Electroencephalography
  • Evoked Potentials, Auditory*
  • Evoked Potentials, Somatosensory*
  • Female
  • Heart Arrest / complications
  • Heart Arrest / physiopathology*
  • Humans
  • Hypoxia, Brain / etiology
  • Hypoxia, Brain / physiopathology
  • Labyrinth Diseases / complications
  • Labyrinth Diseases / physiopathology
  • Male