| 1
.
| Vestibulocochlear nerve (VIII) (vestibular part) |
| 2
.
| Facial nerve (VII) |
| 3
.
| Cochlea |
| 4
.
| Upper pointer: Tendon of tensor tympani muscle Lower pointer: Tympanic membrane |
| 5
.
| Greater superficial petrosal nerve |
| 6
.
| Lesser superficial petrosal nerve (note connection with otic ganglion) |
| 7
.
| Tensor tympani muscle |
| 8
.
| Internal carotid plexus |
| 9
.
| Internal carotid artery (within carotid canal) |
| 10
.
| Nerve to tensor tympani muscle (from otic ganglion) |
| 11
.
| Deep petrosal nerve |
| 12
.
| Otic ganglion (two small separate ganglionic masses present) |
| 13
.
| Plexus of small nerve filaments covering medial surface of mandibular nerve (connections undetermined) |
| 14
.
| Mandibular nerve (V) |
| 15
.
| Tympanic antrum |
| 16
.
| Upper pointer: Lateral semicircular canal Lower pointer: Vestibule (utricle and saccule removed) |
| 17
.
| Upper pointer: Short crus incus Lower pointer: Capitulum mallei |
| 18
.
| External acoustic meatus |
| 19
.
| Sensory nerve to skin of meatus (branch of auriculotemporal nerve) |
| 20
.
| Flaccida part of tympanic membrane |
| 21
.
| Anterior process malleus |
| 22
.
| Chorda tympani |
| 23
.
| Articular disc of mandible (cut through) |
| 24
.
| Capitulum (head) of mandible |
| 25
.
| Middle meningeal artery |
| 26
.
| External pterygoid muscle |
| 27
.
| Masseteric nerve |
