Kernohan's Notch - Signs and Symptoms

Signs and Symptoms

Symptoms directly related to the Kernohan's notch is most commonly paralysis or weakness on one side of the body (ipsilateral paralysis / paresis), the so-called Kernohan's sign. Paralysis and weakness is known as hemiplegia and hemiparesis, respectively. This is due to destruction or pressure applied to the motor fibers located in the cerebral peduncle. A more rare sign of Kernohan's notch is ipsilateral oculomotor nerve palsy.

However, most patients come into the clinic citing symptoms associated with the primary injury causing the Kernohan's notch. Since so many types of head injuries exist, virtually any symptom of brain trauma can be seen accompanying Kernohan's notch. These symptoms may range from total paralysis to simple headache, nausea, and vomiting.