Muscles of Anterior Compartment of Forearm Flashcards
flexor carpi radialis
O: medial epicondyle of humerus
I: base of 2nd and 3rd metacarpals
N: median nerve (C6, C7)
A: flexes and abducts hand at wrist
Pronator Teres
O: ulnar head– coronoid process of ulna
humeral head– medial epicondyle of humerus
I: middle of convexity of lateral surface of radius
N: median nerve (C6, C7)
A: pronates and flexes forearm (at elbow)
palmaris longus
O: medial epicondyle of humerus
I: distal 1/2 of flexor retinaculum, palmar aponeurosis
N: median nerve (C7, C8)
A: flexes hand (at wrist) and tenses palmar aponeurosis
flexor carpi ulnaris
humeral and ulnar head
O: olecranon and post border (via aponeurosis)
I: pisiform, hook of hamate, 5th metacarpal
N: ulnar nerve (C7, C8)
A: flexes and adducts hand (at wrist)
flexor digitorum superficialis
O: humero-ulnar head– medial epicondyle of humerus and
coronoid process of ulna
radial head– oblique line of radius
I: shafts of middle phalanges of medial 4 finers
N: median nerve (C7, C8, T1)
A: flexes prox interphalangeal joints of middle 4 fingers
flexes prox phalanges at metacarpophalangeal joints
flexor digitorum profundus
O: prox 3/4 of medial and ant surfaced of ulna and interosseus
membrane
I: bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
N: lateral part (to digits 2 and 3)– median nerve (C8, T1)
middle part (to digits 4 and 5)– ulnar nerve (C8, T1)
A: flexes distal interphalangeal joints of digits 2, 3, 4, and 5
assists w/ wrist flexion
flexor pollicis longus
O: ant surface of radius and adjacent interosseous membrane
I: base of distal phalanx of thumb
N: ant interosseous nerve, from median nerve (C8, T1)
A: flexes phalanges of 1st digit (thumb)
pronator quadratus
O: distal 1/4 of ant surface of ulna
I: distal 1/4 of ant surface of radius
N: ant interosseous nerve, from median nerve (C8, T1)
A: pronates forearm, deep fibers bind radius and ulna
