Tuesday, April 25, 2017

Cranial nerve III damage (Oculomotor nerve damage mnemonic)


The CN III has both motor (central) and parasympathetic (peripheral) components.

Which fibers get affected in diabetes?
Which would lead to loss of pupillary light reflex?
Which fibers are compressed first?
Which would cause the down and out pupil?

Don't know? Check the video out!

Motor output
Fibers in the centre of the nerve
Supplies extraocular muscles
Affected in Diabetes mellitus

Parasympathetic output
Fibers on the periphery
Supplies the pupil
Affected by compression (eg, PCom aneurysm, uncal herniation)

Cranial nerve III damage (Oculomotor nerve damage mnemonic)
That's all!

1 comment:

  1. This is a good explanation of what it is. I'm finding articles and videos all over the internet telling what it is, but none telling how to get rid of it. I've already had an MRI and seen two doctors and neither one would tell me what could be done to fix it. Of course, both of them cost me over $300 out of pocket so they could tell me what it was. I want to know if this is permanent.


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