X CLOSE

Dissection of oral region

Genoglossus muscle; lingual artery; glossopharyngeal nerve, left lateral view

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Image #70-2
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Dissection of oral region
Genoglossus muscle; lingual artery; glossopharyngeal nerve, left lateral view
The lingual and hypoglossal nerves have been partially removed and the hyoglossus muscle cut through to expose the lingual artery (22) and its major branches. Periosteum has been stripped from the hyoid bone and the left lamina of the thyroid cartilage has been resected. The styloglossus muscle has been divided to expose the stylopharyngeus muscle.
1 . Nasal mucosal membrane (periosteal surface)
2 . Medial incisor
3 . Fimbriated fold (of tongue)
4 . Cut ends of lingual nerve
5 . Genioglossus muscle
6 . Hyoglossus muscle (partially resected) and deep lingual artery
7 . Sublingual artery (cut off)
8 . Branches of hypoglossal nerve (cut off)
9 . Geniohyoid muscle (fibers separated)
10 . Position of epiglottal cartilage (beneath membrane)
11 . Lamina right thyroid cartilage
12 . Palatine nerves anterior and medial
13 . Levator veli palatini muscle
14 . Tensor veli palatini muscle
15 . Lymphatic vessel draining soft palate
16 . Superior pharyngeal constrictor muscle
17 . Ascending palatine artery
18 . Stylopharyngeus muscle
19 . Styloglossus muscle (cut across, fibers separated to expose branch of hypoglossal nerve entering inferior part of muscle)
20 . Glossopharyngeal nerve (IX)
21 . Hypoglossal nerve (XII) (cut off)
22 . Upper pointer: Lingual artery Lower pointer: Hyoid branch of lingual artery (cut off)
23 . External carotid artery (pointer opposite origin of superior laryngeal artery)
24 . Upper pointers: Branches of dorsal tongue lingual artery Lower pointer: Lesser horn hyoid bone
25 . Greater horn hyoid bone
26 . Upper pointer: Superior laryngeal artery Lower pointer: Superior laryngeal nerve
27 . Piriform recess (outer surface of mucosa)
28 . Medial laryngeal gland