Forearm Flashcards
Pronator teres
O: Two heads
1) medial epicondyle via CFT
2) coronoid process of the ulna
I: lateral radius (middle 1/3)
A: pronation of forearm at proximal radioulnar joint
N: median
Blood: ulnar and radialWhat are the superficial muscles of the anterior forearm?
Pronator teres
Flexor Carpi Radialis
Palmaris longus
Flexor Carpi ulnaris
Flexor Carpi Radialis
O: medial condyle via CFT I: base of 2nd and 3rd metacarpal A: 1) wrist flexion 2) radial deviation (also elbow flexion) N: median Blood: ulnar and radial
Palmaris longus
*not in everyone* O: medial epicondyle via CFT I: palmar aponeuroses and flexor retinaculum A: wrist flexion (and elbow flexion) N: median Blood: ulnar
Flexor Carpi ulnaris
O: medial epicondyle via CFT
I: pisiform, hook of hamulus, 5th metacarpal
A: 1) wrist flexion; 2) ulnar deviation; (maybe elbow flexion)
N: ulna
Blood: ulnar
Name the intermediate muscles of the anterior forearm.
Flexor Digitorum Superficialis
Flexor Digitorum Superficialis
O: 1) medial epicondyle of humerus via CFT
2) coronoid process of ulna
3) proximal 1/3 of radius
I: palmar surface of middle phalanges 2-5 (and some wrist flexion)
A: flexes fingers 2-5 at MCPs and PIPs
N: median
Blood: ulnar and radial
What are the deep muscles of the anterior forearm?
Flexor Digitorum Profundus
Flexor Pollicis longus
Pronator quadratus
Flexor Digitorum Profundus
O: medial/anterior ulna and interosseous membrane
I: palmar surfaces of distal phalanges 2-5
A: flexes fingers 2-5 at MCPs DIPs. (And some wrist flexion)
N: median and ulnar (two!!)
Blood: radial, ulnar and ant. interosseous
Flexor Pollicis longus
O: anterior surface of radius and interosseous membrane
I: distal phalanx of thumb
A: thumb flexion at CMC, MCP, and IP (and some wrist flexion)
N: median
Blood: radial and ant. interosseous
Pronator quadratus
O: anterior distal ulna I: anterior distal radius A: pronates forearm at distal radioulnar joint N: median Blood: anterior interosseous
What are the superficial muscles of the posterior forearms?
Anconeus Extensor Carpi Radialis longus Extensor Carpi Radialis brevis Extensor Digitorum Extensor Digiti Minimi Extensor Carpi ulnaris
Anconeus
O: lateral epicondyle of humerus (CET) I: posterior proximal ulna (lateral to Olecranon process) A: elbow extension N: radial Artery: deep brachial (radial)
Extensor carpi radialis longus
O: lateral supracondylar ridge I: posterior base of metacarpal # 2 A: 1) elbow extension 2) radial deviation and elbow FLEXION N: radial Blood: brachial and radial
Extensor carpi radialis brevis
O: lateral epicondyle (CET) I: posterior base of metacarpal #3 A: 1) wrist extension 2) radial deviation and 3) elbow FLEXION N: radial Blood: brachial and radial
What muscles are in the Wad of 3?
Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
O: lateral epicondyle via CET
I: middle and distal phalanges 2-5 (via dorsal digital expansion)
A: 1)wrist extension 2)finger extension 2-5 @ MCP, PIPs and DIPs
N: radial
Blood: posterior interosseus
Extensor digiti minimi
O: lateral epicondyle (CET)
I: middle and distal phalanges of digit #5 via Dorsal digital expansion
A: 1)wrist extension 2)extension of finger #5 at MCP, PIP and DIP
N: radial
Blood: posterior interosseus
Extensor carpi ulnaris
O: lateral epicondyle via CET and posterior middle 1/3 or ulna
I: posterior base of metacarpal #5
A: 1) wrist extension 2) ulnar deviation
(Elbow extension)
N: radial
Blood: posterior interosseus
What bones make up the anatomical snuff box?
Posterior: EPL tendon
Anterior: EPB and Abductor Poll Long tendons
Proximal: styloid of radius
Floor: trapezium and/or scaphoid
What comprise the deep muscles of the posterior forearm?
Supinator Abductor pollicis longus Extensor pollicis brevis Extensor pollicis longus Extensor indicis
Supinator
O: 1) lateral epicondyle (CET); 2) supinator crest of ulna
I: proximal 1/3 of radius (post/lat/ant)
A: supination of firearm
N: radial
Blood: radial and posterior interosseus
Abductor pollicis longus
O: 1) middle 1/3 of posterior ulna; 2) interosseous membrane
I: posterior base of metacarpal #1
A: abducts thumb at CMC joint (and thumb extension)
N: radial
Blood: posterior interosseous
Extensor pollicis brevis
O: 1) posterior distal 1/3 of radius; 2) distal 1/3 of interosseous membrane I: posterior base of proximal phalanx #1 A: extends thumb at CMC and MCP N: radial Blood: posterior interosseous
Extensor pollicis longus
O: 1) posterior middle 1/3 of ulna;
2) middle 1/3 interosseous membrane
I: posterior base of distal phalanx #1 via distal digital expansion
A: extends thumb at CMC, MCP, and IP
N: radial
Blood: posterior interosseous
Extensor indices
“Harry Pointer”
O: 1) posterior distal 1/3 of ulna;
2) interosseous membane
I: posterior aspect of middle and distal phalanges of digit #2 via distal digital expansion
A: 1) extends digit #2 at MCP, PIP and DIP. 2) wrist extension
N: radial
Blood: posterior interosseous
The CFT is a point of origin for what muscles?
Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis
The CET is a point of origin for what muscles?
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum
Extensor digiti minimi
