Wrist and hand Flashcards
Innervation for muscles of anterior arm
musculocutaneous
Innervation for muscles of posterior arm
radial
Innervation for muscles of anterior forearm
median (except for flexor carpi ulnaris and the medial 1/2 of flexor digitorum profundus which use the ulnar nerve)
Innervation for muscles of posterior forearm
radial
Innervation for muscles of thenar eminence
(muscles of thenar eminence: abductor pollicis brevis, flexor pollicis brevis, opponens pollicis)
median
Innervation for muscles of hypothenar eminence
(muscles of hypothenar eminence: palmaris brevis, abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi)
median
Innervation for muscles of palm
(muscles of palm: adductor pollicis, lumbricals, palmar interossei, dorsal interossei)
ulnar except for lumbricals 1-2, which are innervated by the median nerve
flexor carpi radialis
O: med epicondyle
I: base 2nd metacarpal
A: flex and abduct hand
Inn: median nerve
flexor carpi ulnaris
O: humeral head - med epicondyle
O: ulnar head - olecranon and post border ulna
I: pisiform hook of hamate, 5th metacarpal bones
A: flex and adduct hand
Inn: ulnar
flexor digitorum superficialis
O: humeroulnar head - med epicondyle, ulnar collateral l., coronoid p. of ulna
O: radial head - sup 1/2 ant border of radius
I: bodies of middle phalanges, digits 2-5
A: flex middle phalanges, prox phalange and hand
Inn: median
palmaris longus
O: med epicondyle
I: distal 1/2 flexor retinaculum and palmar aponeurosis
A: flex hand, tighten palmar aponeurosis
Inn: median
flexor digitorum profundus
O: med & ant surface of ulna and interosseous membrane
I: base distal phalange, digits 2-5
A: flex distal phalanges of digits 2-5
Inn: median nerve for lateral half, ulnar nerve for medial half
flexor pollicis longus
O: ant surface radius and adj interosseous membrane
I: base distal phalanx 1st digit
A: flex thumb
Inn: median
extensor carpi radialis longus
O: lat supracondylar ridge of humerus
I: base 2nd metacarpal
A: extend and abduct hand at wrist
Inn: radial
extensor carpi radialis brevis
O: lat epicondyle
I: base 3rd metacarpal
A: extend and abduct hand at wrist
Inn: radial
extensor digitorum
O: lateral epicondyle
I: ext expansions of digits 2-5
A: extends digits 2-5 at MCP joint and extend hand at wrist
Inn: radial