Flexor Compartment of foramen and hand origins, insertion, action, innervation

Brachioradialis Origin 

Lateral border of distal end of humerus.

Brachioradialis Insertion

Superior to styloid process of radius.

Brachioradialis Action

Flexes forearm at elbow joint most effectively when arm is mid-pronated.

Brachioradialis Innervation

Radial nerve.

Pronator Teres Origin

Medial epicondyle of humerus and coronoid process of ulna.

Pronator Teres Insertion 

Midlateral surface of radius.

Pronator Teres Action 

Pronates forearm at radioulnar joints and weakly flexes forearm at elbow joint.

Pronator Teres Innervation

Median nerve

Flexor carpi radialis Origin 

Medial epicondyle of humerus.

Flexor carpi radialis Insertion

Metacarpals 2 and 3

Flexor carpi radialis Action

Flexes and abducts hand (radial deviation) at wrist joint.

Flexor carpi radialis Innervation

Median nerve

Palmaris Longus Innervation

Median nerve

Palmaris Longus Origin

Medial epicondyle of humerus.

Palmaris Longus Insertion

Metacarpals 2 and 3

Palmaris Longus Action 

Flexes and abducts hand (radial deviation) at wrist joint.

Flexor carpi ulnaris Origin

Medial epicondyle of humerus and superior posterior border of ulna.

Flexor carpi ulnaris Insertion 

Pisiform, hamate, and base of metacarpal 5.

Flexor carpi ulnaris Action 

Flexes and adducts hand (ulnar deviation) at wrist joint.

Flexor carpi ulnaris Innervation

Ulnar nerve.

Flexor Digitorum Superficalis Origin

Medial epicondyle of humerus, coronoid process of ulna, and ridge along lateral margin or anterior surface (anterior oblique line) of radius.

Flexor Digitorum Superficalis Insertion

Middle phalanx of each finger.*

Flexor Digitorum Superficalis Action

Flexes middle phalanx of each finger at proximal interphalangeal joint, proximal phalanx of each finger at metacarpophalangeal joint, and hand at wrist joint.

Flexor Digitorum Superficalis Innervation

Median nerve.

Flexor digitorum profundus Origin

Anterior surface of body of ulna and ulnar side of interosseous membrane.

Flexor digitorum profundus Insertion

Base of distal phalanx of each finger

Flexor digitorum profundus Action 

Flexes distal and middle phalanges of each finger at interphalangeal joints, proximal phalanx of each finger at metacarpophalangeal joint, and hand at wrist joint.

Flexor digitorum profundus Innervation

Median and ulnar nerves.

Flexor pollicis longus origin

Anterior surface of radius and interosseous membrane (sheet of fibrous tissue that holds shafts of ulna and radius together).

Flexor pollicis longus insertion

Base of distal phalanx of thumb.

Flexor pollicis longus action 

Flexes distal phalanx of thumb at interphalangeal joint

Flexor pollicis longus innervation

Median nerve.

Pronator quadratus Origin 

Distal portion of shaft of ulna.

Pronator quadratus Insertion 

Distal portion of shaft of radius.

Pronator quadratus Action

Pronates forearm at radioulnar joints.

Pronator quadratus Innervation

Median nerve