Kernohan's notch phenomenon: a case study.

In a patient suffering from brain herniation due to a right-sided subdural hematoma, a neurological examination should show left-sided deficits, known as localizing signs, and a decreased level of consciousness. However, false localizing signs may be present, attributed to pressure on Kernohan's notch. A case study demonstrates these false localizing signs, known as Kernohan's notch phenomenon.