Question

chapter 15 multiple choice question 29
1 part | -- of 1 point

nerve fibers from the medial aspect of each eye ______.

cross over to the opposite side at the chiasma

divide at the chiasma, with some crossing and some not crossing

go to the superior colliculus only

pass posteriorly without crossing over at the chiasma

Explanation:

To solve this, we recall the anatomy of the optic chiasma. Nerve fibers from the medial (nasal) aspect of each eye cross over to the opposite side at the optic chiasma. The other options are incorrect: the fibers don't partially cross or only go to the superior colliculus, and medial fibers do cross (unlike lateral fibers which don't cross).

Answer:

A. cross over to the opposite side at the chiasma