Muscles of anterior compartment of forearm Flashcards
Pronator Teres (PT) Origin-2
Ulnar head: Coronoid process of ulna
Humeral head: Medial epicondyle of humerus
Pronator Teres (PT) Insertion
Middle of convexity of lateral surface of radius
Pronator Teres (PT) Action
Pronates and flexes forearm
Flexor carpi radialis (FCR) Origin
Medial epicondyle of humerus
Flexor carpi radialis (FCR) Insertion
Base of 2nd (3rd) metacarpal
Flexor carpi radialis (FCR) Action
Flexes and abducts hand (Radial deviation)
Palmaris Longus Origin
Medial epicondyle of humerus
Palmaris Longus Insertion-2
- Distal 1/2 of flexor retinaculum
- Palmar aponeurosis
Palmaris Longus Action-2
- Flexes hand
- Tenses palmar aponeurosis
Flexor carpi ulnaris (FCU) Origin-2
- Olecranon process
- Posterior border of ulna
Flexor carpi ulnaris (FCU) Insertion-3
- Pisiform
- Hook of hamate
- 5th metacarpal
Flexor carpi ulnaris (FCU) Action
Flexes and adducts hand (Ulnar deviation)
Flexor digitorum superficialis (FDS) Origin-3
Humero-ulnar head:
- Medial epicondyle of humerus
- coronoid process of ulna
Radial head:
-Oblique line of radius
Flexor digitorum superficialis (FDS) Insertion
Shafts of middle phalanges of medial 4 digits
Flexor digitorum superficialis (FDS) Action-2
- Flexes proximal interphalangeal (IP) joints of middle 4 digits
- Flexes proximal phalanges at metacarpophalangeal (MCP) joints
Flexor digitorum profundus (FDP) Origin-2
- Proximal 3/4 of medial and anterior surfaces of ulna
- Interosseous membrane
Flexor digitorum profundus (FDP) Insertion
Bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
Flexor digitorum profundus (FDP) Innervation-2
Anterior interosseous branch of Median nerve-digits 2+3
Ulnar nerve-Digits 4+5
Flexor digitorum profundus (FDP) Action
- Flexes IP joints of medial 4 fingers
- Assists w/ wrist flexion
Flexor pollicis longus (FPL) Origin-2
- Anterior surface of radius
- Interosseous membrane
Flexor pollicis longus (FPL) Insertion
Base of distal phalanx of thumb
Flexor pollicis longus (FPL) Action
Flexes phalanges of thumb
Pronator quadratus Origin
Distal quarter of anterior surface of ulna
Pronator quadratus Insertion
Distal 1/4 of anterior surface of radius
Pronator quadratus Action
Pronates forearm
Muscles innervated by median nerve
1) Pronator Teres
2) Flexor carpi radialis
3) Palmaris Longus
4) Flexor digitorum superficialis
5) Part of Flexor digitorum profundus
Muscles innervated by the Anterior interosseous nerve (From median nerve)
1) Flexor pollicis longus
2) Pronator quadratus
Muscles innervated by ulnar nerve
1) Flexor carpi ulnaris
2) Part of Flexor digitorum superficialis
