1
.
| Greater superficial petrosal nerve |
2
.
| Geniculate ganglion |
3
.
| Vestibule |
4
.
| Base of stapes in fenestra vestibuli |
5
.
| Capitulum of malleus |
6
.
| Body of incus |
7
.
| Facial nerve (VII) |
8
.
| Upper pointer: Posterior crus of stapes Lower pointer: Capitulum of stapes |
9
.
| Pyramidal eminence |
10
.
| Upper pointer: Manubrium of malleus Lower pointer: Tympanic membrane |
11
.
| Stapedius nerve and muscle |
12
.
| Tympanic sinus |
13
.
| Mastoid cell |
14
.
| Position of stylomastoid foramen |
15
.
| Alar fascia |
16
.
| Upper and lower divisions of vestibulocochlear nerve (VIII) (vestibular part) |
17
.
| Vestibulocochlear nerve (VIII) (cochlear part) |
18
.
| Internal acoustic meatus |
19
.
| Base of modiolus |
20
.
| Veins surrounding internal carotid artery within carotid canal |
21
.
| Osseous spiral lamina in basal turn of cochlea |
22
.
| Tympanic nerve |
23
.
| Mastoid cell |
24
.
| Veins within petro-occipital fissure |
25
.
| Glossopharyngeal nerve (IX) |
26
.
| Vagus nerve (X) |
27
.
| Anastomotic branch glossopharyngeal nerve with auricular brancjes of vagus nerve |