1. Arm, Elbow, Forearm

2. Two Compartments of Arm
Arm = Shoulder to elbow; aka Brachium
Anterior = flexors
Innervated by Musculocutaneous Nerve
Blood supply by brachial aa
Posterior =extensors
Innervated by Radial Nerve
Blood supply by brachial profunda aa

3. Muscles of the Anterior Compartment
Coracobrachialis
Biceps brachii
Brachialis

4. Anterior Muscles

5. Anterior muscles

6. Nerves

7. Muscles of the Posterior Compartment
Triceps brachii
Long head
Lateral head
Medial head
Anconeus

8. Posterior Muscles

9. Posterior Nerve

10. Anconeus

11. Regional Blood Supply Brachial Brachial Profunda
Superior Ulnar Collateral
Inferior Ulnar Collateral
Radial Collateral
Middle Collateral

12. Blood Supply

13. Blood Supply

14. Veins

15. Elbow Complex Humero-Ulnar Joint – flexion/extension
Olecranon Process and Olecranon Fossa (post.)
Trochlea and Trochlear Notch (ant.)
Joint Capsule ant. and post.
Ulnar (Medial) collateral
Radial (Lateral) collateral
Anular
Lateral Ulnar collateral – See Interactive Hand
Carrying angle

16. Elbow Complex

17. Elbow Complex

18. Elbow Complex

19. Elbow Complex

20. Elbow Complex

21. Elbow Complex

22. Fill In the Blanks

23. Elbow complex

24. Elbow Complex

25. Elbow
Use Interactive Elbow

26. Elbow Complex Humero-radial Head of radius with capitulum of humerus
Accessory motion
Not a direct articulation

27. Radio-Ulnar Joints – Supination and Pronation
Superior
Head of Radius in radial notch
Anular ligament
Inferior
Head of Ulna in ulnar notch
Anterior and Posterior radio-ulnar ligaments
Interosseous Membrane

28. R-U Joints

29. R-U Joints

30. Supination and Pronation

31. Cubital Fossa

32. Cubital Fossa

33. Cubital Fossa

34. Cubital Fossa

35. Forearm AKA Antebrachium – Two Compartments
Anterior = ventral
Flexors
All but 1 1/2 mm are innervated by median (or a branch called the anterior interosseous nerve), the other 1 1/2 innervated by the ulnar
Three layers – superficial, intermediate and deep
Most have 1 Point of origin on the medial epicondyle - CFT

36. Forearm Posterior = dorsal Extensors
Innervated by the radial nerve (or one of two branches called either posterior interosseous nerve or deep radial)
Three layers = superficial, intermediate and deep
Most have 1 point of origin on the lateral epicondyle - CET

37. Anterior Surface Superficial P.Teres Flexor Carpi Radialis
Flexor Carpi Ulnaris
Palmaris Longus

38. Superficial Muscles

39. Anterior Surface
Intermediate
Flexor Digitorum Superficialis

40. Intermediate Layer -Origin

41. Intermediate Layer - Insertion

42. Anterior Surface Deep Layer
Flexor digitorum profundus (anterior interosseous branch of median nerve
Flexor pollicus longus
Pronator quadratus (ant. Interosseous)

43. Deep Layer - Origins

44. Deep Layer - Insertions

45. Compare Insertions

46. Compare Insertions

47. Nerves of Anterior Forearm

48. Anterior Surface Transverse Carpal Ligament AKA Flexor Retinaculum
Guyen’s Canal
Carpal Tunnel Syndrome

49. TCL

50. TCL – Median N.

51. Guyens’ Tunnel – Ulnar N.

52. Posterior Surface Superficial Brachioradialis
Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Extensor Carpi Ulnaris

53. Superficial Muscles

54. Posterior Surface Intermediate Layer Extensor Digitorum Communis
Extensor Indicus Proprius
Extensor Digit Minimi

55. Intermediate Muscles

56. EDC Insertion

57. EDC Insertion

58. Posterior Surface Deep Anatomical “Snuff” box Out-cropper muscles
Supinator
Abductor Pollicus Longus
Extensor Pollicus Longus
Extensor Pollicus Brevis
Anatomical “Snuff” box
Out-cropper muscles

59. Deep Muscles

60. Deep Muscles

61. Posterior Surface Extensor Retinaculum Compartments 1 epb and apl
2 ecrb, ecrl
3 epl
4 edc and eip
5 edm
6 ecu

62. Extensor Tendons

63. Extensor Tendons at Wrist

64. Nerves of Posterior Forearm

65. Nerves of Posterior Forearm

66. Common Injuries
Radial Nerve Above wrist extensor innervation= “Dropped Wrist”
Colle’s fracture
Compression syndromes
Epicondylitis – AKA “Tennis Elbow” “Golfer’s Elbow”

67. Regional Blood Supply Ulnar Radial Ant. Ulnar Recurrent
Post. Ulnar Recurrent
Radial
Radial Recurrent
Common Interosseous
Interosseous Recurrent
Ant. Interosseous
Post. Interosseous

68. Blood Supply

69. Blood Supply

70. Blood Supply

71. Blood Supply