Dissection of anterior and lateral regions of neck

Deep layers of infrahyoid muscles, anterior view

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Image #74-4
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Dissection of anterior and lateral regions of neck
Deep layers of infrahyoid muscles, anterior view
The bellies of the left sternohyoid and omohyoid muscles have been removed. The left sternoclavicular joint has been opened.
1 . Depressor anguli oris muscle
2 . Platysma
3 . External jugular vein
4 . Sternocleidomastoid muscle
5 . Sternohyoid muscle
6 . Anterior supraclavicular nerves
7 . Deltopectoral triangle
8 . Clavicular part pectoralis major muscle
9 . Pyramidal lobe of thyroid gland
10 . Suprasternal space
11 . External maxillary artery
12 . Mandible
13 . Anterior belly digastric muscle
14 . Descending branch hypoglossal nerve
15 . Common carotid artery (within carotid sheath)
16 . Internal jugular vein
17 . Left pointer: Sternohyoid muscle (cut off) Right pointer: Omohyoid muscle (cut off)
18 . Thyrohyoid muscle
19 . Ansa hypoglossi
20 . Sternothyroid muscle
21 . Prevertebral fascia covering scalene muscles
22 . Upper pointer: Jugular trunk Lower pointer: Lymphatic trunk from inferior deep cervical lymph nodes
23 . Clavicle
24 . Subclavius muscle
25 . Axillary artery and vein
26 . Sternoclavicular ligament
27 . Sternoclavicular joint (medial and lateral cavities)
28 . Interclavicular ligament (partially removed)