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Forearm & hand OIANs

QuestionAnswer
ECRB and ECRL origin common extensor origin: lateral epicondyle of the humerus
ECRB and ECRL insertion ECRL: base of 2nd metacarpal ECRB: base of 3rd metacarpal
ECRB and ECRL action wrist extension and radial deviation
ECRB and ECRL innervation radial
Extensor digitorum origin common extensor origin: lateral epicondyle of the humerus
Extensor digitorum insertion By 4 tendons, each to the base of the extensor mechanism and to the dorsl base of the proximal phalanx oc the fingers
Extensor digitorum action Extends the MCP joints, extends the IP joints of the second through 5th digits
Extensor digitorum innervation radial
Extensor digiti minimi origin ulnar side of the belly of the extensor digitorum
extensor digiti minimi insertion tendon usually divides, joining the ulna side of the tendon of the extensor digitorum
extensor digiti minimi action extends the MCP joints, extends the IP joints of the little finger
extensor digiti minimi innervation radial
abductor pollicis longus origin posterior surface of the middle prat of the radius and , and adjacent interosseus membrane
abductor pollicis longus insertion base of 1st metacarpal
abductor pollicis longus action 1st digit abd and ext at CMC joint
abductor pollicis longus innervation radial
extensor pollicis brevis origin posterior surface of the middle to distal parts of the radius and adjacent interosseous membrane
extensor pollicis brevis insertion proximal phalanx of thumb
extensor pollicis brevis action 1st digit extension at MCP, IP joints
extensor pollicis brevis innervation radial
extensor pollicis longus origin posterior surface of the middle part of the ulnr and adjacent interosseous membrane
extensor pollicis longus insertion distal phalanx of thumb
extensor pollicis longus action 1st digit extension at MCP, IP joints
extensor pollicis longus innervation radial
extensor indicis origin posterior surface of the middle to distal part of the ulnar and adjacent interosseous membrane
extensor indicis insertion tendon blends with the ulnar side of the index tendons of the extensor digitorum
extensor indicis action 2nd digit extension and wrist etension
extensor indicis innervation radial
supinator origin lateral epicondyle of the humerus and supinator crest of the ulna wrist extension and radial deviation
supinator insertion lateral surface of the proximal radius
supinator action supination
supinator innervation radial
pronator teres origin humeral head: medial epicondyle ulnar head: medial to the tuberosity of ulna
pronator teres insertion lateral surface of the middle radius
pronator teres action pronation of forearm, elbow flexion
pronator teres innervation median
flexor carpi radialis origin common flexor origin: medial epicondyle of the humerus
flexor carpi radialis insertion 2nd and 3rd metacarpals
flexor carpi radialis action wrist flexion, radial deviation
flexor carpi radialis innervation median
palmaris longus origin common flexor origin: medial epicondyle of the humerus
palmaris longus insertion insertion: carpal ligament and palmar aponeurosis of the hand
palmaris longus action flexion of wrist
palmaris longus innervation median
FCU oigin humeral head: common flexor origin: medial epicondyle of the humerus Ulnar head: posterior border of the middle 1/2 of the ulna
FCU insertion pisiform bone, pisohamate and pisometacarpal ligaments, and palmar base of the 5th metacarpal
FCU action wrist flexion, ulnar deviation
FCU innervation ulnar
Flexor digitorum superficialis origin humeroulnar head: common flexor origin, and medial side of coronoid process of the ulna radial head: oblique line just distal and lateral to the bicipital tuerosity
flexor digitorum superficialis insertion By 4 tendons, each to the sides of the middle phalanges of the fingers
Flexor digitorum superficialis action flexion of PIP joint of fingers
flexor digitorum superficialis innervation median
Flexor pollicis longus origin middle part of the anterior surface of the radius and adjacent interosseous membrne
flexor pollicis longus insertion distal phalanx of the thumb
flexor pollicis longus action flexion of distal phalanx of the thumb
flexor pollicis longus innervation median
flexor digitorum profundus origin proximal 3/4 of the medial side of the ulna and adjacent interosseous membrane
flexor digitorum profundus insetion By 4 tendons, each to the palmar base of the distal phalanges of the fingers
flexor digitorum profundus action flex wrist, flex all joints to DIP in digits 2-5
flexor digitorum profundus innervation medial half: ulnar nerve lateral half: median nerve
Pronator quadratus origin anterior surface of distal ulna
pronator quadratus insretion anterior surface of distal radius
pronator quadratus action: pronates forearm
pronator quadratus innrvation median
abductor pollicis brevis origin palmar tubercles of the trapezium and scaphoid
abductor pollicis brevis insertion base of proximal phalanx of thumb
abductor pollicis brevis action abduction of thumb at MCP, CMC joint
abductor pollicis brevis innervation median
flexor pollicis brevis origin transverse carpal ligament and palmar tubercle of trapezium
flexor pollicis brevis insertion radial side of proximal phalanx of thumb
flexor pollicis brevis action flexion of thumb
flexor pollicis brevis innervation median
opponens pollicis origin transverse carpal ligament and palmar tubercle of trapezium
opponens pollicis insertion shaft of the thumb metacarpal
opponens pollicis action opposition of thumb
opponens pollicis innervation median
adductor pollicis origin oblique hand: capitate bone and base of second and third metacarpal transverse head: palmar surface of 3rd metacarpal
adductor pollicis insertion ulnar side of the base of the proximal phalanx of the thumb
adductor pollicis action adduction of thumb
adductor pollicis innervation ulnar
abductor digiti minimi origin pisiform bone, and tendon of the flexor carpi ulnaris
abductor digiti minimi insertion base of the proximal phalanx of the little finger
abductor digiti minimi action abduction of the little finger at MCP joint
abductor digiti minimi innervation ulnar
flexor digiti minimi origin hook of hamate
flexor digiti minimi insertion base of the proximal phalanx of the little fingr
flexor digiti minimi action flexion of the little finger
flexor digiti minimi innervation ulnar
opponens digiti minimi origin transverse carpal ligament and hook of hamate
opponens digiti minimi insertion shaft of the fifth metacarpal
opponens digiti minimi action flexion of 5th metacarpal, lateral rotation producing opposition
opponens digiti minimi innervation ulnar
lumbricals of the hand origin 1st&2nd: radial surface of the flexor profundus tendons of the index and middle fingers. 3rd: adjacent sides of the flexor profundus tendons of the middle and ring fingers. 4th: adjacent sides of the flexor profundus tendons of the ring and little fingers
lumbricals of the hand insertion into the radial border of the extensor expansion on the drum of the respective digits
lumbricals action flexion at MCP, extension at IP
lumbricals innervation: medial 2: ulnar nerve lateral 2: median nve
Created by: ecosio
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