Forearm Flashcards
In general where do forearm flexors attach
medial epicondyle of humerus via common flexor tendon. “flexor epicondyle”
What are the layers of the forearm flexor compartment
superficial, intermediate and deep
what motions do the forearm flexors do
flex digits, flex abduct and adduct hand at the wrist
Are all forearm flexors innervated by same nerve
all but 1.5
origin and insertion of pronator teres
origin: humeral head- medial epicondyle by common flexor tendon
insertion: lateral surface, middle portion of shaft of radius
What is the action of pronator teres
pronates and slightly flexes forearm
what innervates pronator teres
median n
origin and insertion flexor carpi radialis
origin: medial epicondyle of humerus by common flexor tendon
insertion: base of 2nd and 3rd metacarpal
action of flexor carpi radialis
flexes and wrist and abducts hand
what innervates flexor carpi radialis
median n
origin and insertion palmaris longus
origin: medial epicondyle of humerus by common flexor tendon
insertion: palmar aponeurosis
what is the action of palmaris longus
flexes at wrist
what innervates palmaris longus
median n
origin of the heads of flexor carpi ulnaris
humeral head- medial epicondyle of humerus
ulnar head- medial border of olecranon process and proximal dorsal surface of ulna
Insertion of flexor carpi ulnaris
pisiform, hamulus of hammate, base of 5th metacarpal
what are the actions of flexor carpi ulnaris
flexes wrist and adducts hand
innervation of flexor carpi ulnaris
ulnar n
what is the specialized deep fascial around carpal bones
flexor retinaculum
what canal does the flexor retinaculum form and what is in it?
carpal tunnel- which has the tendons of intermed and deep mm and median n
what are the origins of flexor digitorum superficialis
humeroulnar head- medial epicondyle of humerus and coronoid process of ulna
radial head- proximal 1/2 anterior border of radius
insertions of flexor digitorum superficialis
palmar aspect of middle phalanges digits 2-5
what are the actions of flexor digitorum superficialis
flexes proximal IP join and flex MP as well, wrist and forearm
what innervates flexor digitorum superficialis
median n
origin and insertion of flexor digitiorum profundus
origin: proximal 2/3 medial anterior surface of ulna and adjacent interosseous membrane
insertion: palmar surface of distal phalanges, digits 2-5
action of flexor digitorum profundus
flexes distal IP joints, assists in flexion of proximal IP, MP and wrist joint
innervation to flexor digitorum profundus
lateral portion: digits 2&3 median N
medial portion: digits 4&5 ulnar n
origin and insertion of flexor pollicis longus
origin: ulna, anterior surface of radius and adjacent interosseus membrane
insertion: palmar surface, base of distal phalanx of thumb
what is the action of flexor pollicis longus
flexes thumb
what innervates flexor pollicis longus
median n
origin and insertion of pronator quadratus
origin: distal 1/4 of anterior surface of ulna
insertion: distal 1/4 of anterior surface of radius
what is the action of pronator quadratus
pronates hand
what is the innervation of pronator quadratus
median n
what is the general proximal attachment of the forearm extensors
lateral epicondyles
how many layers is the extensor compartment organized into
superficial and deep
what action do the forearm extensors have on thumb
extension and abduction
do the extensors assist in supination of hand
yes
What innervates all the forearm extensors
radial nerve