1
.
| Central gray matter and tractus solitarius |
2
.
| Nucleus hypoglossal nerve (XII) |
3
.
| Internal arcuate fibers and decussation of lemniscus |
4
.
| Pyramid (medulla oblongata) |
5
.
| Tonsil (ventral paraflocculus) |
6
.
| Quadrangular lobule |
7
.
| Foramen caecum and pons |
8
.
| Posterior cerebellar incisure and medial aperture fourth ventricle (foramen of magendie) |
9
.
| Gracile nucleus |
10
.
| Cuneate nucleus |
11
.
| Spinal trigeminal nucleus |
12
.
| Dorsal spinocerebellar tract |
13
.
| Inferior olivary nucleus |
14
.
| Choroid plexus |
15
.
| Glossopharyngeal nerve (IX) and vagus (X) |
16
.
| Vestibulocochlear nerve (VIII) |
17
.
| Facial nerve (VII) |
18
.
| Trigeminal nerve (V) |
19
.
| Optic tract |
20
.
| Infundibulum (cut across) |