Arm OIAN Flashcards
Flexor carpi radialis
O: Medial epicondyle
I: proximal ends of second and third MC bones
A: wrist and elbow flexion, radial deviation
N: Median
Pronator teres
O:medial epicondyle; anterior surface of ulna below coronoid process
I: midpoint of the lateral surface of the shaft of the radius
A: pronation (PM), flexion of elbow
N: median
Flexor carpi ulnaris
O: medial epicondyle
I: pisioform, proximal end of 5th MC bone, hamate via psi-hamate ligament
A: flexion of wrist and elbow, ulnar deviation (PM)
N: ulnar
Palmaris longus
O: meidal epicondyle
I: palmar aponeurosis
A: weak flexor of wrist and elbow
N: median
Flexor digitorum profundus
O: anterior surface of ulna
I: base of the distal phalanges of medial 4 fingers
A: wrist flexion (PM), MCP, PIP and DIP flexion
N: medial fibers = ulnar, lateral fibers = median
Flexor digitorum superficialis
O: medial epicondyle, anterior surface of radius, sometimes anterior surface of ulna
I: either side of middle phalanges of medial 4 fingers
A: help in flexion of wrist and elbow. MCP and PIP flexion
N: median
Pronator quadratus
attachments:
-distal quarter of radius and ulna
A: pronates forearm
N: median
Flexor policis longus
O: medial epicondyle (sometimes), anterior surface of radius
I: distal phalanx of thumb
A: flexion of thumb (PM)
N: median
Anconeus
O: lateral epicondyle
I: upper 1/3 of posterior surface of ulna
A: extension of elbow
N: radial
brachioradialis
O: lateral supracondylar ridge
I: styloid process of radius
A: flexion of elbow (PM from 90-110 degrees)
N: radial
Extensor carpi radialis longus
O: lateral supracondylar ridge
I: proximal end of 2nd MC
A: extension of wrist and elbow, radial deviation
N: radial
Extensor carpi radialis brevis
O: lateral epicondyle
I: proximal end of 3rd MC
A: extension of wrist and elbow, radial deviation
N: deep radial
Extensor digitorum
O: lateral epicondyle
I: DDE (indirectly to middle and distal phalange)
A: PM for extension of wrist, MCP, PIP and DIP
N: posterior interosseous
Extensor digiti minimi
O: lateral epicondyle
I: DDE of 5th digit
A: extension of wrist and joints of 5th finger
N: posterior interosseous
Extensor carpi ulnaris
O: lateral epicondyle
I: proximal end of 5th MC
A: extension of wrist and elbow; adduction
N: posterior interosseous
Supinator
O: ulnar head = supinator crest of ulna humeral head = lateral epicondyle I: lateral aspect of middle 1/3 of radius A: supination N: deep radial
Abductor pollicis longus
O: shaft of ulna
I: proximal end of 1st MC
A: abduction of thumb (PM)
N: posterior interosseous
Extensor indicis
O: shaft of ulna
I: DDE of 2nd finger
A: extension of 2nd finger
N: posterior interosseous
Extensor pollicis longus
O: shaft of ulna
I: distal phalanx of thumb
A: extension of thumb (PM), assists in radial deviation and wrist flexion
N: posterior interossous
Extensor pollicis brevis
O: posterior surface of radius and IO membrane
I: proximal phalanx of thumb
A: radial deviation, extension of thumb
N: posterior interosseous
Flexor pollicis brevis
O: lateral carpal bones and flexor retinaculum I: proximal phalanx A: flexion of thumb N: superficial head - median nerve deep head - ulnar nerve
Abductor pollicis brevis
O: scpahoid and trapezium; flexor aponeurosis
I: proximal phalanx
A: abduction of thumb
N: median nerve
Adductor pollicis
O:
oblique head and distal head - distal carpal bones and 2nd and 3rd MC
transverse head
oblique and distal heads - base of proximal phalanx of thumb
A: PM for adduction of thumb
N: deep ulnar (both heads)
Opponens pollicis
O: lateral carpal bones
I: lateral surface of first MC bone
A: PM opposition of thumb
N: median n.
Abductor digiti minimi
O: medial carpal bones and tendon of FCU
I: proximal phalanx of 5th finger and sometimes 5th MC
A: abduction of 5th digit
N: deep ulnar nerve
Palmaris brevis
O: palmar fascia, palmari longus, flexor retinaculum
I: deep surface of skin on medial side of hand
A: making hand into cup
N: superficial ulnar nerve
Opponens digiti minimi
O: medial carpal bones and flexor retinaculum
I: medial side of 5th MC bone
A: opposition of 5th finger
N: deep ulnar
Flexor digiti minimi
O: medial carpal bones and flexor retinaculum
I: proximal end of proximal phalanx of 5th finger
A: helps in flexion
N: deep ulnar
Palmar interosseous
O: 2, 4 and 5th MC bones
I: DDE of corresponding fingers
A: adduction of fingers
N: deep ulnar
Lumbricals
O: FDP
I: DDE of corresponding layers
A: flexion of MCP, extension of PIP and DIP
N: lateral 2 = medial n., medial 2 = deep ulnar n.
Dorsal interosseous
O: all MC’s
I: DDE of fingers
A: abduction of fingers
N: deep ulnar
