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Radiology Neuroradiology a0937a6f

Kernohan notch phenomenon is not associated with-

A
Paralysis contralateral to side of lesion
B
false localising sign
C
Contralateral crus cerebrii compressed by tentorium cerebelli
D
associated transtentorial herniation due to supratentorial mass/lesion
High-Yield Explanation
Kernohan phenomenon': Also been referred to as 'Kernohan-Woltman notch phenomenon' and is a false localizing sign, causing paralysis to the ipsilateral side of the lesion occuring due to supratentorial lesion causing transtentorial herniation (mainly uncal -green arrow)causing compression of brainstem and indentation of contralateral crus cerebri against the tentorium cerebelli.

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