Page 1 of 1: anatomy - cranial nerves

ashgk98 · Credits: 2639 My Scrapbook

Which of following is the only cranial nerve which supplies a contralateral muscle
1. third
2. fourth
3. seventh
4. twelfth

BRAVO · Credits: 45411 My Scrapbook

is it facial

kalika · Credits: 12507 My Scrapbook My Reading List 12 Books

pls. xplain !!

ardy · Credits: 12764 My Scrapbook

ref harrison 16th pg 174
ans is 3rd cranial nv i.e occulomotor.

ashgk98 · Credits: 2639 My Scrapbook

ardy, i believe you are referencing these lines form Harri - A lesion of the occulomotor nucleus....There is b/l ptosis because the levator muscle is innervatred by a single central subnucleus. There is also weakness of the c/l SR because it is supplied by the occulomotor nu on the other side.

But the question is about CN supplying c/l muscle, not its nucleus.

and it is well known that forehead wrinking is spared in u/l lesions of facial n(implying it is supplied by c/l nerve), i will go with bravo...i.e facial nerve.

by the way thanks to ardy for helping me out to find this point.

BRAVO · Credits: 45411 My Scrapbook

kalika · Credits: 12507 My Scrapbook My Reading List 12 Books

hm i got it, thnx

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