Question

The rootlets of CN IX and X exit between the olive and inferior cerebellar peduncle. What is the correct statement regarding the exit of CN IX and X?

1) They exit anterior to the olive
2) They exit posterior to the olive
3) They exit superior to the olive
4) They exit inferior to the olive

Answer 1

CN IX and X exit posterior to the olive, between the olive and the inferior cerebellar peduncle.

Step-by-step explanation:

The correct statement regarding the exit of CN IX and X is that they exit posterior to the olive.

The olive is a bulge on the ventral surface of the brainstem. CN IX and X, also known as the glossopharyngeal nerve and the vagus nerve respectively, both exit the brainstem posterior to the olive, between the olive and the inferior cerebellar peduncle.