and we’re back! with BRAND SPANKIN' NEW tangents!
to snoo-finity ... and beyond!
NBME 21 Answers
A 65-year-old woman undergoes surgical repair of an ...
Area labeled ‘A’ (Cranial nerve 3)
One pupil larger than the other indicates damage to the pupillary light reflex - afferent: CN II, efferent: CN III.
A little more info regarding other sxs (via UW):
-cavernous carotid aneurysm: small usually asx, enlargement can cause u/l throbbing HA &/or CN deficits. VI most common thus ipsilateral lateral rectus weakness, can cause esotropia = inward eye deviation & horizontal diplopia worse when looking toward lesion
-can also damage III, IV and V1/2
-can occasionally compress optic nerve or chiasm thus ipsilateral monoocular vision loss or non-specific visual acuity decrease