Question

Which of the following lesions is most likely responsible for a patient presenting with ipsilateral lower facial weakness on the right side and ipsilateral upper and lower facial weakness on the right side?

A) Lesion at the stylomastoid foramen
B) Lesion at the cerebellopontine angle
C) Lesion at the hypoglossal canal
D) Lesion at the otic ganglion

Answer 1

A lesion at the stylomastoid foramen is most likely responsible for a patient's ipsilateral facial weakness on the right side, as it is where the facial nerve exits and controls facial muscle movements.

Step-by-step explanation:

The patient presenting with ipsilateral lower facial weakness on the right side and ipsilateral upper and lower facial weakness on the right side is most likely experiencing the effects of a lesion affecting the facial nerve. Among the options provided, a lesion at the stylomastoid foramen is most likely responsible for this presentation. The stylomastoid foramen is the point of exit for the cranial nerve that supplies the facial muscles, and a lesion here could result in weakness or paralysis of those muscles. Lesions at other mentioned locations would affect nerves with different function, not primarily responsible for facial muscle control.