1
.
| Branch of posterior inferior cerebellar artery (PICA) |
2
.
| Tela chorioidea |
3
.
| Choroid plexus fourth ventricle |
4
.
| Floccular peduncle |
5
.
| Medial continuation of cavity of lateral recess toward rhomboid fossa |
6
.
| Ventral cochlear nucleus |
7
.
| Glossopharyngeal nerve (IX) covered by tela chorioidea |
8
.
| Accessory nerve (XI) (spinal root) |
9
.
| Rootlet of vagus nerve (X) |
10
.
| Posterior inferior cerebellar artery |
11
.
| Medullary branch of posterior inferior cerebellar artery |
12
.
| Quadrangular lobule of cerebellum |
13
.
| Flocculus |
14
.
| Brachium pontis (middle cerebellar peduncle) |
15
.
| Inferior cerebellar veins (the vein passing posteriorly across the roof of the lateral recess is known as the petrosal vein) |
16
.
| Distal portion of anterior inferior cerebellar artery |
17
.
| Vestibular root of vestibulocochlear nerve |
18
.
| Cochlear root of vestibulocochlear nerve |
19
.
| Trigeminal nerve (V) |
20
.
| Proximal portion of anterior inferior cerebellar artery |
21
.
| Facial nerve (VII) |
22
.
| Pons |
23
.
| Abducens nerve (VI) |
24
.
| Olive |
25
.
| Pyramid (medulla oblongata) |