X CLOSE

Dissection of oral region

Lingual and hypoglossal nerves; submaxillary duct, left lateral view

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Image #69-7
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Dissection of oral region
Lingual and hypoglossal nerves; submaxillary duct, left lateral view
The internal pterygoid, mylohyoid and anterior belly of the digastric muscles have been removed. The alveolar process of the maxilla has also been cut away, and nerves and vessels exposed in the palate. The sublingual gland has been removed.
1 . Hard palate
2 . Upper pointer: Greater palatine artery and mucosa of palate Lower pointer: Transverse palatine fold (sectioned)
3 . Lateral lingual margin
4 . Apex of tongue
5 . Genioglossus muscle
6 . Geniohyoid muscle
7 . Platysma
8 . Digastric muscle right
9 . Mylohyoid muscle left (transected at raphe and along attachment to hyoid bone)
10 . Upper pointer: Body of hyoid bone Lower pointer: Thyroglossal duct (fibrous remnant)
11 . Anterior palatine nerve within pterygopalatine canal
12 . Tensor veli palatini muscle
13 . Cut edge of buccinator muscle near pterygomandibular raphe
14 . Dorsum of tongue
15 . Superior pharyngeal constrictor muscle
16 . Ascending palatine artery
17 . Minor sublingual duct
18 . Styloglossus muscle
19 . Lingual nerve
20 . External maxillary artery (note plexus of nerves derived from superior cervical ganglion)
21 . Submandibular duct
22 . Stylohyoid muscle
23 . Upper pointer: Lingual artery Lower pointer: Hyoglossus muscle
24 . Hypoglossal nerve (XII)
25 . Superior laryngeal nerve and superior laryngeal artery (in this case the artery arises from the external carotid rather than the superior thyroid artery)
26 . Anterior belly digastric muscle (cut off)
27 . Superior horn thyroid cartilage
28 . Piriform recess (outer aspect of mucosa)
29 . Left lamina thyroid cartilage