Slideshow: Forearm Deep Flexors

Slideshow: Forearm Deep Flexors

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1. The Forearm Deep Flexor Compartment

2. The forearm is the region of the upper limb between the elbow joint proximally and wrist joint distally Deep Forearm Flexors

3. The forearm is the region of the upper limb between the elbow joint proximally and wrist joint distally Elbow Joint Deep Forearm Flexors

4. Deep Forearm Flexors The forearm is the region of the upper limb between the elbow joint proximally and wrist joint distally Elbow Joint Wrist Joint

5. Deep Forearm Flexors The forearm is the region of the upper limb between the elbow joint proximally and wrist joint distally Elbow Joint Wrist Joint Forearm

6. Deep Forearm Flexors There are two long bones in the forearm

7. Deep Forearm Flexors There are two long bones in the forearm Radius lies Laterally

8. Deep Forearm Flexors There are two long bones in the forearm Radius Ulna lies Medially

9. Deep Forearm Flexors The forearm is divided into 2 compartments by the Interosseous membrane and the Deep Fascia Interosseous membrane

10. Deep Forearm Flexors The forearm is divided into 2 compartments by the Interosseous membrane and the Deep Fascia Anterior Compartment contains the Superficial Flexors Deep Flexors

11. Deep Forearm Flexors The forearm is divided into 2 compartments by the Interosseous membrane and the Deep Fascia Anterior Compartment contains the Superficial Flexors Deep Flexors Posterior Compartment contains the Extensors Mobile Wad of Three

12. Deep Forearm Flexors There are 3 Deep Flexors

13. Deep Forearm Flexors Deep Flexors Flexor Digitorum Profundus Flexor Poliicis Longus Pronator Quadratus

14. Deep Forearm Flexors Deep Flexors Flexor Digitorum Profundus Flexor Poliicis Longus Pronator Quadratus In contrast to the superficial flexors, all of these muscles arise distal to the elbow joint and hence do not cause movement at the elbow joint

15. Deep Forearm Flexors Deep Flexors Flexor Digitorum Profundus Arises from the proximal ¾ of the Ulna and the Interosseous Membrane It inserts via slender tendons onto the distal phalanges of the fingers It flexes the Distal Interphalangeal Joints (DIPJ)

16. Deep Forearm Flexors Deep Flexors 2. Flexor Pollicis Longus Arises from the Radius and the Interosseous Membrane It inserts onto the distal phalanx of the thumb It flexes the thumb Interphalangeal Joint (IPJ)

17. Deep Forearm Flexors Deep Flexors 3. Pronator Quadratus Arises from the Distal ¼ of Ulna It inserts onto Distal ¼ of Radius It pronates the forearm

18. Deep Forearm Flexors Cross section through middle of forearm

19. Deep Forearm Flexors Anterior or Volar Surface

20. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface

21. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral

22. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial

23. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Subcutaneous Fat

24. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial

25. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna

26. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna

27. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna Radius

28. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna Radius

29. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna Radius Extensor Compartment

30. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna Radius Extensor Compartment Mobile Wad

31. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna Radius Extensor Compartment Deep Flexor Mobile Wad Superficial Flexors Deep Flexor

32. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna Radius Extensor Compartment Flexor Digitorum Profundus Mobile Wad Superficial Flexors Deep Flexor

33. Deep Forearm Flexors Anterior or Volar Surface Posterior or Dorsal Surface Lateral Medial Ulna Radius Extensor Compartment Mobile Wad Superficial Flexors Flexor Pollicis Longus Flexor Digitorum Profundus

34. Deep Forearm Flexors All Deep Flexors Flexor Digitorum Profundus Flexor Pollicis Longus Pronator Quadratus Supplied by the Anterior Interosseous Nerve (a branch of the Median Nerve) EXCEPT Lateral half of FDP which is supplied by Ulnar Nerve

35. Anterior Forearm Flexor Digitorum Profundus Origin Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane Insertion Base of the distal phalanges of digits 2 - 5 Action Flexes distal phalanges at distal interphalangeal joints of medial four digits; assists with flexion of hand Nerve Supply Medial part: ulnar nerve; Lateral part: anterior interosseous branch of median nerve (C8 and T1) Blood Supply Ulnar and anterior interosseous arteries

36. Anterior Forearm Flexor Pollicis Longus Origin Anterior surface of radius and adjacent interosseous membrane Insertion Base of distal phalanx of thumb Action Flexes interphalangeal joint of 1st digit (thumb) Nerve Supply Anterior interosseous nerve from median nerve (C8 and T1) Blood Supply Anterior interosseous artery

37. Pronator Quadratus Origin Distal 1/4 of anterior surface of ulna Insertion Distal 1/4 of anterior surface of radius Action Pronates forearm Nerve Supply Anterior interosseous nerve from median nerve (C8 and T1 Blood Supply Anterior interosseous artery Anterior Forearm