Third nerve palsy Flashcards
What is the name of the third cranial nerve?
Oculomotor nerve
What does the third cranial nerve control?
Ocular muscles except for the superior oblique and lateral rectus.
What ocular muscles does the third nerve not control?
Superior oblique
Lateral rectus
What is the classic position of the eye in someone with third nerve palsy?
Down and out
What are the other symptoms of third nerve palsy?
ptosis
Dilated pupil
When the pupil is dilated in someone with thirs nerve palsy, what is this referred to as?
Surgical third nerve palsy as opposed to medical third nerve palsy
What does a surgical lesion refer to?
Compressive lesions
What are the possible causes of a surgical third nerve palsy?
Posterior communicating artery aneurysm
Often get pain also
What are the possible causes of a medical third nerve palsy?
Multiple sclerosis
Vascular causes-diabetes or hypertension
Vasculitis
What are the vasculitis causes of third nerve palsy?
Temporal arteritis
SLE
What is not associated with third nerve palsy?
Miosis
What is associated with third nerve palsy?
Ptosis
Eye is deviated ‘down and out’
Pain if due to a posterior communicating artery aneurysm
Diplopia
