Dissection of anterior and lateral regions of neck

Middle layer of cervical fascia and infrahyoid muscles, anterior view

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Image #73-4

Dissection of anterior and lateral regions of neck

Middle layer of cervical fascia and infrahyoid muscles, anterior view

The external layer of cervical fascia has been removed except in suprasternal space (10). The middle layer of cervical fascia covers the sternohyoid muscles (7) and extends laterally to form a sling-like investment for the omohyoid muscle.

1. Depressor anguli oris muscle
2. Platysma
3. Anterior jugular vein (cut off)
4. External jugular vein right
5. Sternocleidomastoid muscles
6. Trapezius muscles
7. Sternohyoid muscles (covered by middle layer of cervical fascia)
8. Anterior supraclavicular nerves
9. Clavicle
10. Superficial fascia (deep lamina of external layer which forms deep boundary of suprasternal space of Bums)
11. Anterior jugular vein (cut off)
12. Jugular venous arch
13. Masseter muscle
14. Sternocleidomastoid muscle (reflected laterally)
15. Internal jugular vein (within carotid sheath)
16. Superior deep cervical lymph nodes
17. Superficial cervical lymph nodes
18. Middle supraclavicular nerves
19. Superficial cervical artery
20. Omohyoid muscle
21. Lymphatic trunk draining nodes in inferior part of posterior cervical triangle
22. Clavicular origin of sternocleidomastoid muscle
23. Clavicular part pectoralis major muscle