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Stack #145391
Muscles of anterior antebrachial compartment
| Question | Answer |
|---|---|
| Pronator teres: Origin | Coronoid process and medial epicondyle of humerus |
| Pronator teres: Insertion | Middle convexity of lateral surface of radius |
| Pronator teres: Innervation | Median nerve |
| Pronator teres: Main action | Pronates and flexes forearm (at elbow) |
| Flexor carpi radialis: Origin | Medial epicondyle of humerus |
| Flexor carpi radialis: Insertion | Base of 2nd metacarpal |
| Flexor carpi radialis: Innervation | Median nerve |
| Flexor carpi radialis: Main action | Flexes and abducts hand (at wrist) |
| Palmaris longus: Origin | Medial epicondyle of humerus |
| Palmaris longus: Insertion | Distal half of flexor retinaculum and apex of palmar aponeurosis |
| Palmaris longus: Innervation | Median nerve |
| Palmaris longus: Main action | Flexes hand (at wrist) and tenses palmar aponeurosis |
| Flexor carpi ulnaris: Origin | Medial epicondyle of humerus, Olecranon and posterior border (via aponeurosis) |
| Flexor carpi ulnaris: Insertion | Pisiform, hook of hamate, 5th metacarpal |
| Flexor carpi ulnaris: Innervation | Ulnar nerve |
| Flexor carpi ulnaris: Main action | Flexes and adducts hand (at wrist) |
| Flexor digitorum superficialis: Origin | Medial epicondyle, superior half of anterior border |
| Flexor digitorum superficialis: Insertion | Shafts of middle phalanges of medial four fingers |
| Flexor digitorum superficialis: Innervation | Median nerve |
| Flexor digitorum superficialis: Main action | Flexes middle phalanges at proximal interphalangeal joints of middle four fingers; flexes proximal phalanges at metacarpophalangeal joints |
| Flexor digitorum profundus: Origin | Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane |
| Flexor digitorum profundus: Insertion | Bases of distal phalanges of 4th and 5th fingers, 2nd and 3rd |
| Flexor digitorum profundus: Innervation | Ulnar nerve |
| Flexor digitorum profundus: Main action | Flexes distal phlanges 4 and 5 at distal interphalangeal joints, 2 and 3 |
| Flexor pollicis longus: Origin | Anterior surface of radius and adjacent interosseous membrane |
| Flexor pollicis longus: Insertion | Base of distal phalanx of thumb |
| Flexor pollicis longus: Innervation | Median nerve |
| Flexor pollicis longus: Main action | Flexes phalanges of 1st digit |
| Pronator quadratus: Origin | Distal quarter of anterior surface of ulna |
| Pronator quadratus: Insertion | Distal quarter of anterior surface of radius |
| Pronator quadratus: Innervation | Median nerve |
| Pronator quadratus: Main action | Pronates forearm; deep fibers bind radius and ulna |