UE Muscles - Anterior Forearm

pronator teres (ulnar head, humeral head) action

pronates & flexes forearm at elbow

pronator teres (ulnar head, humeral head) PA

ulnar head: coronoid process, humeral head: medial epicondyle of humerus

pronator teres (ulnar head, humeral head) DA

middle of convexity of lateral surface of radius

pronator teres (ulnar head, humeral head) innervation

median nerve C6, C7

palmaris longus action

flexes hand at wrist, tenses palmar aponeurosis

palmaris longus PA

medial epicondyle of humerus

palmaris longus DA

distal half of flexor retinaculum, apex of palmar aponeurosis

palmaris longus innervation

median nerve C7, C8

flexor carpi radialis action

flexes & abducts hand at wrist

flexor carpi radialis PA

medial epicondyle of humerus

flexor carpi radialis DA

base of 2nd metacarpal

flexor carpi radialis innervation

median nerve C6, C7

flexor carpi ulnaris (humeral head, ulnar head) action

flexes & adducts hand at wrist

flexor carpi ulnaris (humeral head, ulnar head) PA

humeral head: medial epicondyle of humerus, ulnar head: olecranon & posterior border of ulna via aponeurosis

flexor carpi ulnaris (humeral head, ulnar head) DA

pisiform, hook of hamate, 5th metacarpal

flexor carpi ulnaris (humeral head, ulnar head) innervation

ulnar nerve C7, C8

flexor digitorum superficialis (humero-ulnar head, radial head) action

flexes middle phalanges at proximal interphalangeal joints of middle 4 digits. acting more strongly, also flexes proximal phalanges at metacarpophalangeal joints

flexor digitorum superficialis (humero-ulnar head, radial head) PA

humero-ulnar head: medial epicondyle, coronoid process, radial head: superior half of anterior border

flexor digitorum superficialis (humero-ulnar head, radial head) DA

shafts of middle phalanges of medial 4 digits

flexor digitorum superficialis (humero-ulnar head, radial head) innervation

median nerve C7, C8, T1

flexor digitorum profundus (medial part, lateral part) action

medial part: flexes distal phalanges 4 & 5 at distal interphalangeal joints, lateral part: flexes distal phalanges 2 & 3 at distal interphalangeal joints

flexor digitorum profundus (medial part, lateral part) PA

proximal 3/4 of medial & anterior surfaces of ulna & interosseous membrane

flexor digitorum profundus (medial part, lateral part) DA

medial part: bases of distal phalanges of 4th & 5th digits, lateral part: bases of distal phalanges of 2nd & 3rd digits

flexor digitorum profundus (medial part, lateral part) innervation

medial part: ulnar nerve C8, T1. lateral part: anterior interosseous nerve from median nerve C8, T1

flexor pollicis longus action

flexes phalanges of 1st digit (thumb)

flexor pollicis longus PA

anterior surface of radius & adjacent interosseous membrane

flexor pollicis longus DA

base of distal phalanx of thumb

flexor pollicis longus innervation

anterior interosseous nerve from median nerve C8, T1

pronator quadratus action

pronates forearm, deep fibers bind radius & ulna together

pronator quadratus PA

distal 1/4 of anterior surface of ulna

pronator quadratus DA

distal 1/4 of anterior surface of radius

pronator quadratus innervation

anterior interosseous nerve from median nerve C8, T1