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Forearm & hand OIANs
| Question | Answer |
|---|---|
| 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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