Forearm - Anterior Compartment

pronator teres (ulnar head/humeral head)

origin: ulnar head, coronoid process of ulna

humeral head, medial epicondyle of the humerus

insertion: middle of convexity of lateral surface of radius

flexor carpi radialis

origin: medial epicondyle of humerus

insertion: base of 2nd (3rd) metacarpal

palmaris longus

origin: medial epicondyle of humerus
insertion: distal half of flexor retinaculum, palmar aponeurosis

flexor carpi ulnaris (ulnar head/humeral head)

origin ulnar head, olecranon and posterior border of ulna (via aponeurosis),

humeral head, medial epicondyle of humerus
insertion: pisiform, hook of hamate, 5th metacarpal

flexor digitorum superficialis

origin: humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
radial head, oblique line of radius
insertion: shafts (bodies) of middle phalaanges of medial four digits

flexor digitorum profundus

origin: proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane

insertion: base of distal phalanges of 2-5

flexor policis longus

origin: anterior surface of radius and adjacent interosseous membrane

insertion: base of distal phalanx of thumb

pronator quadratus

origin: distal quarter of anterior surface of ulna

insertion: distal quarter of anterior surface of radius