Anterior Forearm Muscles (superficial, intermediate and deep) flexors

Question 1

Pronator Teres (PT): ulnar head & humeral head (s)

Answer 1

pronates forearm and flexes elbow joint
nerve supply - median nerve
coronoid process of ulna -> middle of covexity of lateral surface of radius

Question 2

Flexor carpi radialis (FCR) (s)

Answer 2

flexes and abducts hand at wrist
nerve supply - median nerve
median epicondyle of humerus -> base of 2nd (3rd) metacarpal

Question 3

Palmaris longus (s)

Answer 3

flexes hand (at wrist) and tenses palmar aponeurosis
nerve supply - median nerve
medial epicondyle of humerus -> distal half of flexor retinaculum, palmar aponeurosis

Question 4

Flexor carpi ulnaris (FCU): humeral head and ulnar head (s)

Answer 4

flexes and adducts hand at wrist
nerve supply - ulnar nerve
humeral head: medial epicondyle of humerus
ulnar head: olecranon and posterior border of ulna (via aponeuorsis)
-> pisiform, hook of hamate, 5th metacarpal

Question 5

Flexor digitorum superficialis (FDS) (i)

Answer 5

flexes wrist joint; carpometacarpal joints
flexes proximal interphalangeal joints of middle four digits; acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints
nerve supply - median nerve
humeral-ulnar head: medial epicondyle of humerus and coronoid process of ulna
radial head: oblique head of radius
-> shafts (bodies) of middle phalanges of medial four digits

Question 6

Flexor digitorum profundus (FDP) (d)

Answer 6

flexes wrist joints, carpometacarpal joints; flexes distal interphalangeal joints of digits 2, 3, 4 and 5; assists with wrist flexion
nerve supply - lateral part: median nerve medial part: ulnar nerve
proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane -> bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits

Question 7

Flexor pollicis longus (FPL) (d)

Answer 7

flexes wrist joint, carpometacarpal joints; flexes metacarpophalangeal and interphalangeal joints of thumb
nerve supply - anterior interosseous nerve, from median nerve
anterior surface of radius and adjacent interosseous membrane -> base of distal phalanx of thumb

Question 8

Pronator quadratus (d)

Answer 8

pronates forearm; deep fibers bind radius and ulna together
distal quarter of anterior surface of ulna -> distal quarter of anterior surface of radius