COMEDK 2007 MCQ Answer 10
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The correct answer is D
LMN paralysis of CN VII
LMN paralysis of CN VII
- Bell's Palsy is a LMN paralysis in which there is an abolition of both voluntary and reflex movements of the facial muscles. On the ipsilateral side the face is masklike and the forehead immobile
- corneal sensitivity remains (CN V) but the patient is unable to blink or close the eyelid.
- lacrimation on the lesion side may be impaired (greater petrosal nerve)
- there may be a reduction of saliva (chorda tympani nerve)
- taste is lost on the ipsilateral anterior 2/3 of the tongue (chorda tympani)
- ear pain
- there can be an increased acuity to sound (hyperacusis) due to paralysis of the stapedius muscle
- when a lesion occurs at the location where VII emerges from the pons, as the patient opens his mouth, his eyes close (jaw-winking phenomenon)
Tags: Bell's palsy
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