Bassett Collection of Stereoscopic Images of Human Anatomy

Dissection of left orbit from an anterior approach

Branches of trigeminal and facial nerves in orbital and infraorbital regions

Image #52-5

KEYWORDS: Eye, Face, Muscles and tendons, Peripheral nervous system.

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Higher resolution images are available for a fee. Contact Drew Bourn, PhD, MLIS.

Dissection of left orbit from an anterior approach
Branches of trigeminal and facial nerves in orbital and infraorbital regions
Portions of the orbicularis oculi muscle remain over the medial parts of the eyelids but have been reflected in various ways to show underlying structures. The zygomatic muscle (24) and zygomatic head of the quadratus labii superioris muscle (26) have been partially removed.
1 . Supratrochlear nerve
2 . Infratrochlear nerve
3 . Upper pointer: Fascia over superior tarsus Lower pointer: Medial palpebral artery (branch which communicates with supraorbital artery displaced inferiorly)
4 . Ascending branches of dorsal nasal artery
5 . Dorsal nasal artery emerging from orbit
6 . Anastomotic branch between infratrochlear nerve and facial nerve
7 . Angular vein (divided)
8 . Orbicularis oculi muscle (reflected upward)
9 . Angular head of levator labii superioris muscle
10 . Inferior palpebral branches of infraorbital nerve
11 . External nasal branch infraorbital nerve
12 . Alar branch of angular artery
13 . Infraorbital head of levator labii superioris muscle
14 . Communications between buccal branches of facial nerve and superior labial branches of infraorbital nerve
15 . Superior labial branches of infraorbital nerve
16 . Orbital septum
17 . Zygomaticotemporal branch zygomatic nerve and zygomatico-orbital artery
18 . Superior tarsus and lacrimal nerve
19 . Temporalis muscle
20 . Layer of fat beneath orbicularis oculi muscle
21 . Zygomaticofacial branch of zygomatic nerve
22 . Communication between zygomatic branch facial nerve and inferior palpebral branch of infraorbital nerve
23 . Malar surface zygomatic bone
24 . Zygomaticus muscle (cut across)
25 . Zygomatico-maxillary suture
26 . Zygomatic head of levator labii superioris muscle
27 . Buccal branches of facial nerve
28 . Masseter muscle
29 . Parotid duct (cut across)
30 . Buccinator muscle
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