Extensor Muscles Of Forearm(superficial layer) Flashcards
Brachioradialis p.a.
Proximal 2/3 of lateral supra-epicondylar ridge of humerus
The extensor tendons are held in place in the wrist region by the _____ ______, which prevents…
Extensor retinaculum
Which prevents bowstringing of the tendons when the hand is extended at the wrist joint
Brachioradialis d.a.
Lateral surface of distal end of radius( proximal to styloid process)
Brachioradialis Innervation
Radial nerve
C5c6c7
Brachioradialis action
Relatively weak flexion
Extensor carpi radialis longus p.a.
Lateral supra-epicondylar ridge of humerus
Extensor carpi radialis longus d.a.
Dorsal aspect of base of 2nd metacarpal
Extensor carpi radialis longus innervation
Radial nerve
C6c7
Extensor carpi radialis longus action
Extend and abduct hand at wrist joint
Extensor carpi radialis brevis p.a.
Lateral epicondyle of humerus(ceo)
Extensor carpi radialis brevis d.a.
Dorsal aspect of base of 3rd metacarpal
Extensor carpi radialis brevis innervation
Deep branch of radial nerve
C7c8
Extensor carpi radialis brevis action
Extend and abduct hand at wrist joint
Extensor digitorum p.a
LEH- CEO
Extensor digitorum d.a.
Extensor expansions of medial four fingers
Extensor digitorum innervation
Posterior interosseous nerve
C7c8
Cont. of deep branch of radial nerve
Extensor digitorum action
Extends medial four fingers
Extensor digiti minimi p.a.
L.e.h. - CEO
Extensor digiti minimi d.a.
Extensor expansion of 5th finger
Extensor digiti minimi innervation
Posterior interosseous nerve
C7c8
Cont. of deep branch of radial nerve
Extensor digiti minimi action
Extends 5th finger
Extensor carpi ulnaris p.a.
L.e.h.
Extensor carpi ulnaris d.a.
Dorsal aspect of base of 5th metatarsal
Extensor carpi ulnaris innervation
Posterior interosseous nerve
C7c8
Cont. of deep branch of radial nerve
Extensor carpi ulnaris action
Extends and adducts hand at wrist joint
