Magnetic resonance imaging of Kernohan's notch

A. R. Cohen, J. Wilson

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Compression of the cerebral peduncle against the tentorial incisura contralateral to a supratentorial mass, the so-called Kernohan's notch, can be a cause of false localizing motor signs. The authors present a case of Kernohan's notch secondary to a traumatic extradural hematoma. The patient developed an oculomotor palsy and a dense motor deficit ipsilateral to the extra-axial hematoma. Magnetic resonance imaging in the postoperative period clearly showed the midbrain lesion. The motor deficit and 3rd nerve palsy subsequently resolved.

Original languageEnglish (US)
Pages (from-to)205-207
Number of pages3
Issue number2
StatePublished - Jan 1 1990
Externally publishedYes


  • Cerebral peduncle
  • Epidural hematoma
  • Herniation
  • Kernohan's notch

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology


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