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Gross - M of Forearm
Action, Origin, Insertion, and Nerves
| Question | Answer |
|---|---|
| Pronator teres (Ulnar&humeral head) insertion | Middle of convexity of lateral suface of radius |
| Pronator teres nerve | Median nerve |
| Pronator teres action | Pronates and flexes forearm @ elbow |
| Pronator teres( Ulnar head) origin | Coronoid process |
| Flexor Carpi radialis (FCR) Origin | Medial epicondyle of humerus |
| FCR insertion | Base of second metacarpal |
| FCR nerve | Median Nerve |
| FCR action | Flexes and abducts hand @ wrist |
| Palmaris Longus origin | Medial epicondyle of humerus |
| Palmaris longus insertion | Distal half of flexor retinaculum and apex of palmer aponeurosis |
| Palmaris longus nerve | Median Nerve |
| Palmaris longus action | Flexes hand @ wrist, tenses palmar aponeurosis |
| Pronator teres( humeral head) origin | Medial epicondyle of humerus |
| Where is the common flexor origin | Medial epicondyle of humerus |
| Flexor carpi ulnaris (FCU) origin | Humeral: Medial epicondyle of humerus. Ulnar: Olecranon and posterior border, aponeurosis |
| Flexor carpi ulnaris insertion | Humeral & Ulnar: Pisiform, hook of hamate, 5th metacarpal |
| FCU nerve | Ulnar Nerve |
| FCU Action | Flexes and adducts the hand @ wrist. |
| FDS Humeroulnar head origin | Medial epicondyle (common flexor origin and coronoid process) |
| FDS insertion | Shafts (bodies) of middle phalanges of medial four fingers |
| FDS nerve | Median Nerve |
| FDS Action | Flexes middle phalanges@ proximal interphalangeal joints of middle four fingers; flexes proximal phalanges @ metacarpophalangeal joints |
| FDS Radial head origin | Superior half of anterior boarder |
| FDP Origin | Medial & Lateral part: Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane |
| FDP insertion | Medial & Lateral: Bases of distal phalanges of 4th and 5th fingers |
| FDP nerve | Medial: Ulnar nerve Lateral: Anterior interosseous nerve, from median nerve |
| FDP Action (Medial part) | Flexes distal phalanges 4 and 5 @ distal interphalangeal joints |
| FDP Action (Lateral part) | Flexes distal phalanges 2 and 3 @ distal interphalangeal joints |
| Flexor Pollicis longus (FPL) Origin | Anterior surface of radius and adjacent interosseous membrane |
| FPL insertion | Base of distal phalanx of thumb |
| FPL nerve | Anterior interosseous nerve, from median nerve |
| FPL Action | Flexes phalanges of 1st digit (thumb) |
| Pronator quadratus origin | Distal quarter of anterior surface of ulna |
| Pronator quadratus insertion | Distal quarter of anterior surface of radius |
| Pronator quadratus Action | Pronates forearm; deep fibers bind radius and ulna together |