1
.
| Posterior semicircular canal |
2
.
| Transverse sinus (sigmoid portion) |
3
.
| Mastoid cells |
4
.
| Facial nerve (VII) emerging from stylomastoid foramen |
5
.
| Superior bulb of jugular vein (internal surface) |
6
.
| Upper pointer: Internal branch accessory nerve Lower pointer: External branch accessory nerve |
7
.
| Retromandibular process parotid gland |
8
.
| Styloid process temporal bone (covered by periosteum) |
9
.
| Posterior belly of digastric muscle |
10
.
| Internal jugular vein |
11
.
| Digastric branch of facial nerve |
12
.
| Tendon of longissimus capitis muscle (cut across) |
13
.
| Occipital artery |
14
.
| Vestibulocochlear nerve (VIII) |
15
.
| Petro-occipital synchondrosis |
16
.
| Accessory nerve (XI) (reflected anteriorly) |
17
.
| Jugular ganglion of vagus nerve (X) |
18
.
| Lateral part of occipital bone (cut across) |
19
.
| Hypoglossal nerve (XII) |
20
.
| Upper pointer: Ascending pharyngeal artery Lower pointer: Alar fascia |
21
.
| Longus capitis muscle |
22
.
| Internal carotid nerve |
23
.
| Internal carotid artery |
24
.
| Vagus nerve (X) |