Left infraorbital, labial and buccal regions

Relation of infraorbital plexus of nerves to quadratus labii superioris muscle, anterolateral view

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Image #67-1

Left infraorbital, labial and buccal regions

Relation of infraorbital plexus of nerves to quadratus labii superioris muscle, anterolateral view

The orbicularis oculi muscle has been reflected superiorly. The zygomatic head (16) of the quadratus labii superioris muscle has been cut off and its infraorbital head turned superomedially (5). The zygomatic muscle has been removed. The angular artery has been transected.

1. Orbicularis oculi muscle (reflected superiorly)
2. Angular head of levator labii superioris muscle
3. Inferior palpebral branches of infraorbital nerve
4. Branch of facial nerve to angular head of levator labii superioris muscle
5. Infraorbital head of levator labii superioris muscle (reflected)
6. Superior labial branches Infraorbital nerve
7. Muscular branch of angular artery
8. Depressor anguli oris muscle
9. Orbicularis oris muscle
10. Upper lip
11. Cut fibers of zygomaticus muscle and infraorbital head of levator labii superioris muscle
12. Infraorbital margin
13. Orbital branch of angular artery
14. Branch of facial nerve to orbicularis oculi muscle
15. Zygomaticomaxillary suture
16. Zygomatic head of levator labii superioris muscle
17. Buccal branches of facial nerve
18. Masseter muscle
19. Parotid duct (cut off)
20. Anterior facial vein
21. Buccinator muscle
22. Angular artery (cut off)
23. Superior labial artery