Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 2. Neck, Shoulders, Upper Arm, and Upper Thorax (Lungs)

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Atlas of Human Anatomy in Cross Section: Section 2. Neck, Shoulders, Upper Arm, and Upper Thorax (Lungs)

Plate 2.8a

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed

Upper Left Quadrant

Lower Left Quadrant

1. Vertebral plexus of vv., anterior
2. Vertebra, T3 body
3. Inferior thyroid vv.
4. Sternohyoid and sternothyroid mm., origin
5. Manubrium
6. Common carotid a. at subclavian a. bifurcation from brachiocephalic trunk
7. Internal thoracic a.
8. Subclavian a. at bifurcation from brachiocephalic a.
9. Sternoclavicular joint
10. Sternoclavicular joint disk
11. Brachiocephalic v., right
12. Subclavius m. and clavicle
13. Pectoralis major m.
14. Thoracoacromial v. and a.
15. Medial pectoral nerve and lateral thoracic a. and w.
16. Pectoralis minor m.
17. Lung, right upper lobe, apical segment
18. Rib 2
19. Axillary v.
20. Pectoralis major m.
21. Cephalic v.
22. Median nerve
23. Tendon m. pectoralis major
24. Bursa m. pectoralis major
25. Coracobrachialis m.
26. Humerus, greater tubercle
27. Ulnar nerve
28. Radial nerve
29. Axillary a.
30. Humerus
31. Subscapular a., origin from axillary a.

32. Triceps brachii, lateral head m.
33. Deltoid m.
34. Teres major m.
35. Rib 3
36. Triceps brachii, long head m.
37. Scapula
38. Teres minor m.

39. Serratus anterior m.
40. Scapula
41. Infraspinatus m.
42. Lung, right upper lobe, posterior segment
43. Rib 4
44. Subscapularis m.
45. Scapula, medial border
46. Rhomboideus major m.
47. Intervertebral disk, T3
48. Vertebra, T4 body
49. Vertebra, T5 arch
50. Spinal cord
51. Vertebra, T4 spinous process

This section passes through the manubrium (5, 103), sternoclavicular joints (9, 10, 101), trachea (105), esophagus (104), mesoesophagus (93), several bronchopulmonary segments (17, 42, 66, 95), the third (2) and fourth (48) thoracic vertebrae, scapulae (37, 40, 45, 56, 61, 64), and the humeri (30, 79).

The lungs are the dominant structures at this level. The following bronchopulmonary segments are identifiable: left lung, upper lobe and division, anterior segment (95) and apical posterior segment (66), and right lung, upper lobe, posterior (42) and apical (17) segments.

The muscles of the arm include the pectoralis minor (16, 92), biceps brachii, long (85) and short (84) heads, pectoralis major (13, 20, 23, 83), coracobrachialis (25, 82), latissimus dorsi (69, 80), deltoid (70, 74, 78), triceps brachii, lateral (32, 72) and long (36, 71) heads, teres major (34), subscapularis (44, 58, 68), teres minor (38, 63), and infraspinatus (41).

The nerves of the brachial plexus (22, 27, 28, 73, 75 77) are seen in the axilla.

The common carotid (6) and right subclavian (8) arteries are seen at their bifurcation from the right brachiocephalic trunk.

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