Dissection of anterior and lateral regions of neck

Larynx; nerve supply to cricothyroid muscle, left anterolateral view

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Image #77-3

Dissection of anterior and lateral regions of neck

Larynx; nerve supply to cricothyroid muscle, left anterolateral view

The left inferior constrictor muscle of the pharynx has been reflected from its origin.

1. Sublingual gland (mandible removed)
2. Mylohyoid muscle
3. Anterior belly digastric muscle (turned inferiorly to expose nerve supply)
4. Left cartilaginous plate of thyroid
5. Oblique line of thyroid cartilage (covered by tendinous band for attachment of muscles)
6. Prelaryngeal lymph node
7. Upper pointer: Straight part of cricothyroid muscle Lower pointer: Oblique part of cricothyroid muscle
8. Clavicle right
9. Mylohyoid nerve
10. Internal carotid artery
11. Upper pointer: Superior laryngeal artery Lower pointer: External carotid artery
12. Hypoglossal nerve (XII)
13. Upper pointer: Internal branch superior laryngeal nerve Lower pointer: Superior horn thyroid cartilage
14. Sympathetic trunk
15. Longus capitis muscle
16. Thyrohyoid membrane
17. Superior thyroid artery
18. External branch of superior laryngeal nerve
19. Inferior pharyngeal constrictor muscle (reflected)
20. Common carotid artery
21. Vagus nerve (X)
22. Inferior horn thyroid cartilage
23. Anterior scalene muscle
24. Upper pointer: Inferior laryngeal nerve Lower pointer: Trachea