Posterior Forearm, Hand Flashcards
name the muscles in the superficial layer of the posterior forearm
brachioradialis extensor carpi radialis longus extensor carpi radialis brevis extensor digitorum extensor digiti minimi extensor carpi ulnaris anconeus
name the muscles in the deep layer of the posterior forearm
supinator abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis
which muscle in the superficial posterior forearm is involved with extension of the elbow
anconeus muscle
which muscles in the superficial posterior forearm are involved with flexion at the elbow
brachioradialis
which muscles in the superficial posterior forearm are involved with extension of the wrist or digits?
extensor carpi radialis longus extensor carpi radialis brevis extensor digitorum extensor digiti minimi extensor carpi ulnaris
name the muscles in the deep layer of the posterior forearm
supinator abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis
which muscles pass through the first compartment of the extensor retinaculum
abductor pollicis longus
extensor pollicis brevis
(long abductor and short extensor of the thumb)
which muscles pass through the second compartment of the extensor retinaculum
extensor carpi radialis longus
extensor carpi radialis brevis
which muscles pass through the third compartment of the extensor retinaculum
extensor pollicis longus
which muscles pass through the fourth compartment of the extensor retinaculum
extensor digitorum extensor indicis (usually more medial)
which muscles pass through the fifth compartment of the extensor retinaculum
extensor digiti minimi
which muscles pass through the sixth compartment of the extensor retinaculum
extensor carpi ulnaris
which muscles of the posterior forearm do not pass through the extensor retinaculum?
brachioradialis
anconeus
supinator
compartment?
extensor digiti minimi
5th
compartment?
extensor carpi ulnaris
6th
compartment?
extensor indicis
extensor digitorum
4th
compartment?
extensor pollicis longus
3rd
compartment?
abductor pollicis longus
extensor pollicis brevis
1st
compartment?
extensor carpi radialis longus
extensor carpi radialis brevis
2nd
origin = lateral supracondylar ridge of humrus insertion = distal radius above styloid process innervation = main trunk of radial nerve action = flexes forearm at elbow
brachioradialis
origin = lateral supercondylar ridge of humerus insertion = base of second metacarpal innervation = main trunk of radial nerve action = extensor of the wrist
passes through second compartment under extensor retinaculum
extensor carpi radialis longus
origin = lateral epicondyle of humerus insertion = base of third metacarpal innervation = deep branch of radial nerve action = exstensor of the wrist
passes through second compartment under extensor retinaculum
extensor carpi radialis brevis
origin = lateral epicondyle of humerus insertion = extensor hood to middle and distal phalanges of four fingers innervation = posterior interosseous nerve action = extensor of digits
passes through fourth compartment under extensor retinaculum
extensor digitorum
origin = lateral epicondyle of humerus insertion = extensor hood of little finger innervation = posterior interosseous nerve action = flexor of the little finger
passes through fifth compartment under extensor retinaculum
extensor digiti minimi
origin = lateral epicondyle insertion = base of fifth metacarpal innervation = posterior interosseous nerve action = flexor of the wrist
passes though sixth compartment under extensor retinaculum
extensor carpi ulnaris
origin = lateral epicondyle insertion = upper quarter of ulna innervation = main trunk of radial nerve action = extensor of the elbow
anconeus
origin = lateral epiconyle of ulna insertion= medial surface of radius innervation = deep branch of radial nerve action = rotator of radius over ulna
supinator
origin = radius and ulna
insertion = base of first metacarpal
innervation = posterior interosseous nerve
action =abduction of thumb
muscle of anatomical snuff box
goes through the first compartment under extensor retinaculum
abductor pollicis longus
origin = radius insertion = proximal phalanx of thumb innervation = proximal interosseous nerve action = extensor of thumb
muscle of anatomical snuff box
goes through the first compartment under extensor retinaculum
extensor pollicis brevis
origin = ulna insertion = base of distal phalanx of thumb innervation = posterior interosseous nerve action = extensor of the thumb
muscle of anatomical snuff box
goes through the third compartment under extensor retinaculum
extensor pollicis longus
origin = ulna insertion = extensor hood of index finger innervation = posterior interosseous nerve action = extensor of the index finger
goes through fourth compartment under extensor retinaculum
extensor indicis
extensor pollicis brevis
origin = radius insertion = proximal phalanx of thumb innervation = proximal interosseous nerve action = extensor of thumb
muscle of anatomical snuff box
goes through the first compartment under extensor retinaculum
extensor pollicis longus
origin = ulna insertion = extensor hood of index finger innervation = posterior interosseous nerve action = extensor of the index finger
goes through fourth compartment under extensor retinaculum
abductor pollicis brevis
origin = ulna insertion = base of distal phalanx of thumb innervation = posterior interosseous nerve action = extensor of the thumb
muscle of anatomical snuff box
goes through the third compartment under extensor retinaculum
extensor indicis
origin = ulna insertion = extensor hood of index finger innervation = posterior interosseous nerve action = extensor of the index finger
goes through fourth compartment under extensor retinaculum
supinator
origin = lateral epiconyle of ulna insertion= medial surface of radius innervation = deep branch of radial nerve action = rotator of radius over ulna
brachioradialis
origin = lateral supracondylar ridge of humrus insertion = distal radius above styloid process innervation = main trunk of radial nerve action = flexes forearm at elbow
extensor carpi radialis longus
origin = lateral supercondylar ridge of humerus insertion = base of second metacarpal innervation = main trunk of radial nerve action = extensor of the wrist
passes through second compartment under extensor retinaculum
extensor carpi radialis brevis
origin = lateral epicondyle of humerus insertion = base of third metacarpal innervation = deep branch of radial nerve action = exstensor of the wrist
passes through second compartment under extensor retinaculum
extensor digitorum
origin = lateral epicondyle of humerus insertion = extensor hood to middle and distal phalanges of four fingers innervation = posterior interosseous nerve action = extensor of digits
passes through fourth compartment under extensor retinaculum
extensor digiti minimi
origin = lateral epicondyle of humerus insertion = extensor hood of little finger innervation = posterior interosseous nerve action = flexor of the little finger
passes through fifth compartment under extensor retinaculum
extensor carpi ulnaris
origin = lateral epicondyle insertion = base of fifth metacarpal innervation = posterior interosseous nerve action = flexor of the wrist
passes though sixth compartment under extensor retinaculum
anconeus
origin = lateral epicondyle insertion = upper quarter of ulna innervation = main trunk of radial nerve action = extensor of the elbow
