BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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raises eyelids
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vision
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smell
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None of the above
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Detailed explanation-1: -Somatic (voluntary) functions of the oculomotor nerve include elevation of the upper eyelid via innervation of the levator palpebrae superioris muscle. Other essential functions include coordination of eye muscles for visual tracking and gaze fixation.
Detailed explanation-2: -Background. The oculomotor (third) cranial nerve plays an important role in the efferent visual system by controlling ipsilateral eye movements, pupil constriction, and upper eyelid elevation. Accordingly, damage to the third cranial nerve may cause diplopia, pupil mydriasis, and/or upper eyelid ptosis.
Detailed explanation-3: -It can be divided into a partial or complete palsy. A complete third nerve palsy presents with complete ptosis, with the eye positioned downward and outward with the inability to adduct, infraduct, or supraduct, as well as a dilated pupil with sluggish reaction.