Keyword Analysis & Research: cranial nerves cn iii iv and vi

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Frequently Asked Questions

What cranial nerve is damaged?

If any of the three cranial nerves that control eye movement (3rd, 4th, or 6th cranial nerve) is damaged, people cannot move their eyes normally. Symptoms include double vision when looking in certain directions. If the 3rd cranial nerve (oculomotor nerve) is paralyzed, the upper eyelid is paralyzed.

What is CN 3 palsy?

Lesions in the Subarachnoid space. The most common known etiology is a posterior communicating artery aneurysm. This is a medical emergency. CN III palsy without pupil involvement, as mentioned above pupillary fibers occupy a peripheral location and receive more collateral blood supply that the main trunk of the nerve.

How do you test abducens nerve?

The abducens nerve is examined in conjunction with the oculomotor and trochlear nerves by testing the movements of the eye. The patient is asked to follow a point with their eyes (commonly the tip of a pen) without moving their head.

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