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Bassett Collection of Stereoscopic Images of Human Anatomy

Dissection of left parotideomasseteric region

Left masseter muscle, lateral view

Image #63-5

KEYWORDS: Bones cartilage joints, Cheek, Exocrine and endocrine, Face, Muscles and tendons, Peripheral nervous system.

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Dissection of left parotideomasseteric region
Left masseter muscle, lateral view
The parotid duct (10) has been cut where it passes around the anterior margin of the masseter muscle. Terminal branches of the facial nerve have been severed and retracted anteriorly, and the parotid gland has been retracted posteriorly. The superficial (7) and deep (6) parts of the masseter muscle are clearly distinguishable at their origin from the zygomatic bone and zygomatic arch.
1 . Zygomatic process temporal bone and zygomaticotemporal suture
2 . Zygomaticofacial branch zygomatic nerve
3 . Origin of zygomaticus muscle
4 . Malar surface zygomatic bone
5 . Zygomatic head of levator labii superioris muscle
6 . Deep portion of masseter muscle
7 . Superficial portion of masseter muscle
8 . Depressor anguli oris muscle
9 . Deep facial vein communicating with pterygoid venous plexus
10 . Parotid duct (note veins and connective tissue surrounding cut end of duct)
11 . Buccinator muscle
12 . Anterior facial vein
13 . Buccal nerve
14 . Deep facial lymph node
15 . External maxillary artery
16 . Buccal branches of facial nerve (retracted away from masseter muscle)
17 . Superficial temporal artery
18 . Tragus
19 . Auriculotemporal nerve
20 . Temporal branches of facial nerve (cut across)
21 . Accessory parotid gland (retracted)
22 . Parotid duct (retracted)
23 . Veins and fascia along original course of parotid duct
24 . Parotid gland
25 . Sternocleidomastoid muscle
26 . Buccal fat pad
27 . Inferior extremity of parotid gland
28 . Posterior facial vein