Flashcards
Extrinsic Extensor Muscles of the Hand
Cards in this deck (11)
- 1Location of extrinsic extensor musclesPosterior compartment of forearm
- 2Extrinsic extensors of hand/Posterior compartment of forearm muscles (9)Extensor carpi radialis longus m.
Extensor carpi radialis brevis m.
Extensor digitorum m.
Extensor digiti minimi m.
Extensor carpi ulnaris m.
Abductor pollicis longus m.
Extensor pollicis brevis m.
Extensor pollicis longus m.
Extensor indicis m. - 3Extensor carpi radialis longus m. Origin? Innervation? Function? (2)Origin: supracondylar ridge (humerus), lateral epicondyle (humerus) --> dorsal surface of metacarpal 2
Innervation: radial nerve
Function: extension of wrist, abduction of wrist - 4Extensor carpi radialis brevis m. Origin? Innervation? Function? (2)Origin: lateral epicondyle (humerus) --> dorsal surfaces of the bases of metacarpals 2 and 3
Innervation: radial nerve (deep branch before supinator m.)
Function: extension of wrist, abduction of wrist - 5Extensor digitorum m. Origin? Innervation? Function? (2)Origin: lateral epicondyle (humerus) --> 4 tendons on the dorsal surfaces of middle/distal phalanges of index/middle/ring/little fingers via extensor hoods
Innervation: posterior interosseous nerve
Function: extension of fingers, extension of wrist - 6Extensor digiti minimi m. Origin? Innervation? Function? (1)Origin: lateral epicondyle (humerus) --> extensor hood of little finger
Innervation: posterior interosseous nerve
Function: extension of little finger - 7Extensor carpi ulnaris m. Origin? Innervation? Function? (2)Origin: lateral epicondyle (humerus) --> medial side of base of metacarpal 5
Innervation: posterior interosseous nerve
Function: extension of wrist, adduction of wrist - 8Abductor pollicis longus m. Origin? Innervation? Function? (2)Origin: proximal posterior surfaces of radius and ulna, interosseous membrane --> lateral side of base of metacarpal 1
Innervation: posterior interosseous nerve
Function: abduction of thumb at carpometacarpal joint, accessory exteion of thumb - 9Extensor pollicis brevis m. Origin? Innervation? Function? (2)Origin: posterior surface of radius, interosseous membrane --> dorsal surface of base of proximal phalanx of thumb
Innervation: posterior interosseous nerve
Function: extension of thumb at metacarpophalangeal joint, extension of thumb at carpometacarpal joint - 10Extensor pollicis longus m. Origin? Innervation? Function? (3)Origin: posterior surface of ulna, interosseous membrane --> dorsal surface of distal phalanx of thumb
Innervation: posterior interosseous nerve
Function: extension of thumb at interphalangeal joint, extension of thumb at MCP joint, extension of thumb at carpometacarpal joint - 11Extensor indicis m. Origin? Innervation? Function? (1)Origin: posterior surface of ulna, interosseous membrane --> extensor hood of index finger
Innervation: posterior interosseous nerve
Function: extension of index finger
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- Undergraduate Phase 1 MBChB Flashcards on Extrinsic Extensor Muscles of the Hand, created by Melissa Denker on 20/04/2015.
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- Melissa Denker
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