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Question: What does a third-nerve palsy look like and what causes it?
 Answer: With an oculomotor nerve palsy, the eye is turned down and out. This is because almost every eye muscle is affected. The only muscles still in action are the abducens (turn the eye outwards) and the superior oblique (move the eye down).
Causes for third nerve palsy include an ischemic event from diabetes or hypertension. Also, an aneurysm pushing on the nerve. at the junction of the internal carotid and posterior communicating arteries.
Comments and Feedback
4 Comments
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very good illustration
Comment by chowdhury — April 5, 2010 @ 1:03 pm
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Very true, just try picking up woman with this condition… its a completely self-evident truth.
A CSF leak and subsequent brain sag will pull on your CN3’s. With long-term brain sag you’ll develop subdural hematomas and hygromas that will often effect one eye at side of the hematoma. One pupil being larger than the other is common.
Comment by Brad — September 2, 2011 @ 1:11 am
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Due to a mistreated diabetes I was struck by an ischemia at the 3 optical nerve. Severe diplopia followed. I’m 73 and never suffered of anythhing the whole life.Do you think that by simply taking care of diabetes I can get rid of diplopia. Grateful x your opinion Michelangelo
Comment by michelangelo — October 13, 2011 @ 1:15 pm
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I have had a third nerve palsy since I was four, the cause was never found possibly late onset congenital. I had a laugh at the illustration, it was me before some corrective surgery, now my left eye stares straight ahead. It’s not perfect but better than looking down and out.
I find that I get more attention because the droopy eyelid, men them think I’m winking at them, lol.
Comment by Eliisa — November 9, 2011 @ 2:36 pm
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