![]() It can also be tested by eliciting the corneal reflex, as the temporal and zygomatic branches of the facial nerve supply the efferent (motor) part of this reflex. Test the facial nerve by examining the muscles of facial expression – this can be done by encouraging the patient to pull faces as seen in the photograph above. Notice the lack of facial expression on the leftĬreative commons source by Nervous and mental diseases by Church, Archibald, b. ![]() Image - Multiple pictures illustrating a facial palsy on the left side. Middle ear pathology affecting the petrous bone can involve the facial nerve. Patients may present with a facial palsy (due to paralysis of the muscles of facial expression) or other symptoms such as hyperacusis (increased sensitivity to sound), dry eyes, and altered taste.
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