Dissection of head and neck from a posterior approach

Larynx; arytenoid and posterior cricoarytenoid muscles, quadrangular membrane

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Image #83-5

Dissection of head and neck from a posterior approach

Larynx; arytenoid and posterior cricoarytenoid muscles, quadrangular membrane

The attachment of the cervical part of the esophagus to the cricoid cartilate (ligamentum cricopharyngeum) has been cut and the esophagus (13) sectioned transversely below the inferior margin of the cricoid cartilage. The quadrangular membrane (15) has been exposed by the removal of the aryepiglottic muscle.

1. Epiglottis
2. Lateral thyrohyoid ligament
3. Superior laryngeal nerve (cut across)
4. Superior horn thyroid cartilage
5. Upper pointer: Superior laryngeal artery Lower pointer: Inferior branch of superior laryngeal nerve
6. Left lamina thyroid cartilage (inner surface)
7. Oblique arytenoid muscle
8. Transverse arytenoid muscle
9. Anastomotic branch of superior laryngeal nerve with inferior laryngeal nerve
10. Inferior pharyngeal constrictor muscle (cut across)
11. Inferior laryngeal nerve
12. Thyroid gland
13. Upper pointer: Trachea Lower pointer: Esophagus (sectioned)
14. Pharyngoepiglottic fold
15. Upper pointer: Aryepiglottic fold Lower pointer: Quadrangular membrane
16. Corniculate cartilage
17. Interarytenoid incisure
18. Anastomotic branch superior laryngeal nerve with inferior laryngeal nerve
19. Cricoid cartilage
20. Posterior cricoarytenoid muscle
21. Mucosa of pharynx (separated from muscular tunica)