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7thlecture-131101101140-phpapp02.pdf
- 1. The forearm Prepared By : Dr. Mohaned Abu lehea
- 2. Contents of the Anterior Fascial Compartment of the Forearm • Muscles: • A superficial group : consisting of the pronator teres, the flexor carpi radialis, the palmaris longus, and the flexor carpi ulnaris. • An intermediate group : consisting of the flexor digitorum superficialis; and a • Deep group : consisting of the flexor pollicis longus, the flexor digitorum profundus, and the pronator quadratus
- 3. • Blood supply to the muscles: Ulnar and radial arteries • Nerve supply to the muscles: • All the muscles are supplied by the median nerve and its branches, except the flexor carpi ulnaris and the medial part of the flexor digitorum profundus, which are supplied by the ulnar nerve
- 4. Muscles of the Anterior Fascial Compartment of the Forearm
- 7. Pronator Teres • Origin • Humeral head : Medial epicondyle of humerus • Ulnar head : Medial border of coronoid process of ulna • Action • Lateral aspect of shaft of radius
- 8. • Nerve supply : Median nerve • Action : Pronation and flexion of forearm
- 11. Flexor carpi radialis • Origin • Medial epicondyle of humerus • Insertion • Bases of second and third metacarpal bones
- 12. • Nerve supply • Median nerve • Action • Flexes and abducts hand at wrist joint
- 15. Flexor Carpi Ulnaris • Origin • Humeral head : Medial epicondyle of humerus • Ulnar head : Medial aspect of olecranon process and posterior border of ulna • Insertion • Pisiform bone, hook of the hamate, base at fifth metacarpal bone
- 16. • Nerve supply • Ulnar nerve • Action • Flexes and adducts hand at wrist joint
- 17. Palmaris longus
- 18. s
- 19. Palmaris longus • Origin • Medial epicondyle of humerus • Insertion • Flexor retinaculum and palmar aponeurosis
- 20. • Nerve supply • Median nerve • Action • Flexes hand
- 23. Flexor Digitorum Superficialis • Origin • Humeroulnar head : Medial epicondyle of humerus; medial border of coronoid process of ulna • Radial head : Oblique line on anterior surface of shaft of radius • Insertion • Middle phalanx of medial four fingers
- 24. • Nerve supply • Median nerve • Action • Flexes middle phalanx of fingers and assists in flexing proximal phalanx and hand
- 27. Flexor pollicis longus • Origin • Anterior surface of shaft of radius • Insertion • Distal phalanx of thumb
- 28. • Action • Flexes distal phalanx of thumb • Nerve supply • Anterior interosseous branch of median nerve
- 31. Flexor digitorum profundus • Origen • Anteromedial surface of shaft of ulna • Insertion • Distal phalanges of medial four fingers
- 32. • Action • Flexes distal phalanx of fingers; then assists in flexion of middle and proximal phalanges and wrist • Nerve supply • Ulnar (medial half) and median (lateral half) nerves
- 35. Pronator quadratus • Origin • Anterior surface of shaft of ulna • Insertion • Anterior surface of shaft of radius
- 36. • Action • Pronates forearm • Nerve Supply • Anterior interosseous branch of median nerve
- 37. Muscles of the Lateral Fascial Compartment of the Forearm
- 38. Brachioradialis
- 40. Brachioradialis • Origin • Lateral supracondylar ridge of humerus • Insertion • Base of styloid process of radius
- 41. • Action • Flexes forearm atridge of humerus elbow joint rotates forearm to the midprone position • Nerve supply • Radial nerve
- 42. Extensor carpi radialis longus
- 44. Extensor carpi radialis longus • Origin • Lateral supracondylar ridge of humerus • Insertion • Posterior surface of base of second metacarpal bone
- 45. • Action • Extends and abducts hand at wrist joint • Nerve supply • Radial nerve
- 46. Muscles of the Posterior Fascial Compartment of the Forearm
- 47. Extensor carpi radialis brevis
- 49. Extensor carpi radialis brevis • Origin • Lateral epicondyle of humerus • Insertion • Posterior surface of base of third metacarpal bone
- 50. • Action • Extends and abducts hand at wrist joint • Nerve supply • Deep branch of radial nerve
- 53. Extensor digitorum • Origin • Lateral epicondyle of humerus • Insertion • Middle and distal phalanges of medial four fingers
- 54. • Action • Extends fingers and hand • Nerve supply • Deep branch of radial nerve
- 57. Extensor digiti minimi • Origin • Lateral epicondyle of humerus • Insertion • Extensor expansion of little finger
- 58. • Action • Extends metacarpal phalangeal joint of little finger • Nerve supply • Deep branch of radial nerve
- 61. Extensor carpi ulnaris • Origin • Lateral epicondyle of humerus • Insertion • Base of fifth metacarpal bone
- 62. • Action • Extends and adducts hand at wrist joint • Nerve supply • Deep branch of radial nerve
- 63. Anconeus
- 65. Anconeus • Origin • Lateral epicondyle of humerus • Insertion • Lateral surface of olecranon process of ulna
- 66. • Action • Extends elbow joint • Nerve supply • Radial nerve
- 67. Supinator
- 69. Supinator • Origin • Lateral epicondyle of humerus, anular ligament of proximal radioulnar joint, and ulna • Insertion • Neck and shaft of radius
- 70. • Action • Supination of forearm • Nerve supply • Deep branch of radial nerve
- 73. Abductor pollicis longus • Origin • Posterior surface of shafts of radius and ulna • Insertion • Base of first metacarpal bone
- 74. • Action • Abducts and extends thumb • Nerve supply • Deep branch of radial nerve
- 77. Extensor pollicis brevis • Origin • Posterior surface of shaft of radius • Insertion • Base of proximal phalanx of thumb
- 78. • Action • Extends metacarpophalangeal joints of thumb • Nerve supply • Deep branch of radial nerve
- 81. Extensor pollicis longus • Origin • Posterior surface of shaft of ulna • Insertion • Base of distal phalanx of thumb
- 82. • Action • Extends distal phalanx of thumb • Nerve supply • Deep branch of radial nerve
- 83. Extensor indicis
- 85. Extensor indicis • Origin • Posterior surface of shaft of ulna • Insertion • Extensor expansion of index finger
- 86. • Action • Extends metacarpophalangeal joint of index finger • Nerve Supply • Deep branch of radial nerve
- 87. Thanks