70. Lateral cervical region.

Boundaries

• anterior – posterior border of sternocleidomastoid muscle
• posterior – anterior border of trapezius
• inferior – clavicle

Subdivided by the omohyoid m. into:

1. Omoclavicular triangle
2. Omotrapezoid triangle

Omoclavicular triangle:

Boundaries

1. Cranially: omohyoid – inferior belly
2. Caudally: clavicle
3. Ventrally: sternocleidomastoid – posterior margin

Content

1. Subclavian artery and vein
2. Brachial plexus
3. Phrenic nerve
4. Supraclavicular nerves
5. Ascending cervical artery and anterior vertebral vein
6. Transverse cervical artery and veins
7. Suprascapular artery
8. External jugular vein
9. Venous angle
10. 9.1 Opening of the thoracic duct on the left side
11. 9.2 Opening of the right lymphatic duct on the right side
12. Supraclavicular lymph nodes

Omotrapezoid triangle

Boundaries

1. Caudally: omohyoid – inferior belly
2. Ventrally: sternocleidomastoid – posterior margin
3. Dorsally: trapezius – anterior margin

Content

4. Nervous point (punctum nervosum) – lesser occipital nerve, great auricular nerve, transverse cervical nerve, supraclavicular nerves
5. Accessory nerve
6. Phrenic nerve
7. Supraclavicular part of the brachial plexus
8. External jugular vein and its tributaries – transverse cervical and suprascapular veins
9. Transverse cervical artery and suprascapular artery
10. Deep cervical artery and vein
11. Ascending cervical artery and anterior vertebral vein