Anterior Triangle, Thyroid, and Root of Neck - Laboratory Identifications

Identifications

1. Anterior belly of digastric muscle - at digastric fossa of mandible
2. Posterior belly of digastric muscle - originating from digastric groove of temporal bone
3. Mylohyoid muscle - originating from mylohyoid line
4. Thyrohyoid membrane - between thyroid cartilage and hyoid bone
5. Thyrohyoid muscle - between thyroid cartilage and hyoid bone, innervated by nerve to thyrohyoid
6. Cricothyroid membrane - between cricoid cartilage and thyroid cartilage
7. Cricothyroid muscle - between cricoid cartilage and thyroid cartilage, tenses vocal ligament, external laryngeal nerve
8. Sternothyroid muscle - innervated by ansa cervicalis
9. Sternohyoid muscle - innervated by ansa cervicalis
10. Superior belly omohyoid - innervated by ansa cervicalis, omohyoid fascia
11. Posterior belly omohyoid
12. Thyroid gland - isthmus anterior to first, second, and third tracheal rings
13. Laryngeal prominence - "Adams apple"
14. Vagus nerve - within carotid sheath, posterior to common carotid artery
15. Recurrent laryngeal nerve - traveling within tracheoesophageal groove
16. Superior laryngeal nerve - branching from region of nodose ganglion
17. Internal laryngeal nerve - piercing thyrohyoid membrane
18. External laryngeal nerve - SVE only, terminating at cricothyroid muscle
19. Lingual nerve - crossing superior aspect of hyoglossus, deep to mylohyoid
20. Hypoglossal nerve - crossing inferior aspect of hyoglossus, deep to mylohyoid
21. Nerve to mylohyoid - inferior to mylohyoid along body of mandible, branches to mylohyoid and superior belly digastric
22. Facial nerve (digastric br.) - innervation to posterior belly digastric
23. Superior thyroid artery - early branch (usually first) of external carotid artery
24. Inferior thyroid artery - branch of thyrocervical trunk, crosses posterior to carotid sheath
25. Superior laryngeal artery - branching from superior thyroid artery
26. Auriculotemporal nerve - entering parotid region posterior to neck of mandible
27. Facial nerve - entering parotid gland, leaving stylomastoid foramen
28. Nerve to thyrohyoid - branching from hypoglossal nerve (not part of hypoglossal nerve)
29. Superior root ansa cervicalis - branching from hypoglossal nerve (not part of hypoglossal nerve)
30. Inferior root ansa cervicalis - ascending toward cervical plexus
31. Lingual artery - branching from external carotid, passing toward floor of mouth medial to hyoglossus
32. Facial artery - branching from external carotid, passing through submandibular gland, crossing mandible anterior to masseter
33. Occipital artery - closely related to hypoglossal nerve
34. Ascending pharyngeal artery - related to pharynx
35. Posterior auricular artery - good luck
36. Maxillary artery - entering infratemporal fossa
37. Superficial temporal artery - terminal branch of external carotid artery, entering temporal fossa
38. Submandibular gland - wrapping posterior free edge of mylohyoid
39. Artery to Sternomastoid - crossing medial then lateral to hypoglossal nerve

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