the back of the forearm Flashcards
what is the origin and insertion of the brachioradialis
origin:upper part of lateral supra-condylar ridge of
humerus.
insertion: base of styloid process of radius
what action does the brachioradialis perform
Accessory flexor of elbow joint when forearm is mid-pronated.
what nerve supplies the brachioradialis
the radial nerve
what is the origin and insertion of the extensor carpi radialis longus
origin:Lower part of lateral supra- condylar ridge of humerus.
insertion:Dorsal surface of base of
metacarpal 2.
what action does extensor carpi radialis longus perform
extends and abducts the wrist
what nerve supplies the extensor carpi radialis
the radial nerve
what is the origin and insertion of the extensor carpi radialis brevis
origin: lateral epicondyle of humerus
insertion: Dorsal surface of base of metacarpal 3
what is the action of Extensor carpi radialis brevis
Extends and abducts the wrist.
what is the nerve supply to Extensor carpi radialis brevis
Deep branch of radial nerve.
what is the origin and insertion of extensor digitorum?
origin: Lateral epicondyle o f humerus.
insertion: Four tendons, into thedorsal aspects of the bases of the middle and distal phalanges
what is the action of the extensor digitorum
Extends the inter - phalangeal joints of the (medial 4 fingers), metacapo - phalangeal joints and also extends the wrist
what is the nerve supply of the extensor digitorum
Posterior interosseous branch of radial.
what is the origin and insertion of the extensor digit minimi
origin:Lateral epicondyle of humerus.
Insertion: Extensor expansion of the little finger
what is the action of extensor digiti minimi
extends the little finger
what is the nerve supply of extensor digiti minimi
Posterior interosseous nerve
what is the origin and insertion of extensor carpi ulnaris
Origin: Lateral epicondyle of humerus and posterior border of ulna
Insertion: The base of the metacarpal 5
what is the action of extensor carpi ulnaris
Extends and adducts the wrist.
what is the nerve supply of extensor carpi ulnaris
Posterior interosseous nerve.
what is the origin and insertion of anconeous
Origin: Posterior surface of lateral epicondyle of humerus.
Insertion: Olecranon and upper posterior surface of
ulna.
what is the action of anconeous
extensor of the elbow joint
what is the nerve supply of anconeous
radial nerve
what is the origin and insertion of supinator
Origin: Lateral epicondyle of humerus &crest of the ulna.
Insertion: Lateral surface of radius above to the oblique line.
what is the action of supinator
supination
what is the nerve supply of supinator
deep branch of radial nerve
what is the origin and insertion of Abductor pollicis longus
Origin: Posterior surfaces of ulna and radius (below to the attachments of anconeus and supinator), and intervening interosseous membrane.
Insertion: Lateral side of base of metacarpal 1.
what is the action of Abductor pollicis longus
Abducts carpometacarpal joint of thumb.
what is the nerve supply of Abductor pollicis longus
Posterior interosseous nerve.
what is the origin and insertion of Extensor pollicis brevis
Origin: Posterior surface of radius (below to abductor pollicis
longus) and the adjacent interosseous membrane.
Insertion: Dorsal surface of base of pr
the thumb.
what is the action of Extensor pollicis brevis
extends the metacarpo phalangeal joint of the thumb and also extends the carpo metacarpal joint of the thumb
what is the nerve supply of Extensor pollicis brevis
Posterior interosseous nerve.
what is the origin and insertion of Extensor policis longus
Origin: Posterior surface of ulna (below the abductor pollicislongus) and the adjacent interosseous membrane.
Insertion: Dorsal surface of base of distal phalanx of thumb.
what is the action of Extensor policis longus
Extends inter-phalangeal joint of the thumb
what is the nerve supply of extensor policis longus
Posterior interosseous nerve.
what is the origin and insertion point of extensor indicus
Origin: Posterior surface of ulna (below to extensor pollicis longus) and adjacent interosseous membrane.
Insertion: Extensor expansion of index finger.
what is the action of extensor indicus
Extends index finger.
what is the nerve supply of extensor indicus
Posterior interosseous nerve.
what is the function of extensor retinaculum
It holds the long extensor tendons in position.
what is the origin and insertion of extensor retinculum
Medially to the triquetrum & pisiform bones and laterally to the lower part of the anterior
border of radius.
