Question

Which of the following is the smallest cranial nerve ?

• A. Optic
• B. Trochlear
• C. Facial
• D. Abducence

Answer 1

Answer: (B)

Trochlear

Trochlear nerve is the fourth cranial nerve; a motor nerve, that supplies only superior oblique muscle of the eye. It has following traits :

1 ) Smallest cranial nerve in terms of axon

2) It has longest intra cranial route

3) Only nerve that exists the dorsal aspect of the brainstem .

4) It innervates the superior oblique muscle on the opposite side of its origin.

Hence answer is B.