lecture 13

Superficial layer of forearm

• pronator teres

• Flexor carpus radialis

• Palmar longus

• Flexor carpi ulnaris

Intermediate layer of forearm

Flexor digitorum superficialis

Deep layer of forearm

• Flexor digitorum profundus

• Flexor pollicis longus

• Pronator quadratus

Brachioradialis

Attachment

• proximal two thirds of lateral supraepicondylar ridge of humerous

• Lateral surface of distal end of radius proximal to styloid process

Nerve

• radial nerve

Action

• MIDPRONATED ONE

• Flex the humeroulnal joint and humeroradial joint

Pronator teres ulnar head

attachment

• coronoid process of ulna

• Lateral surface of radius

Nerve

• median nerve

Action

• pronate forearm and flex humeroulnar joint

Pronator teres humeral head

Attachment

• medial epicondyle of humerus

• Lateral surface of radius

Nerve

• median nerve

Action

• Pronate forearm and flex humeroulnar joint

Flexor carpi radialis

Attachment

• medial epicandyle of humerus

• Base of 2 metacarpal

Nerve

• Median nerve

Action

• flex radial carpal joint

• Radial deviation

Palmaris longus

Attachment

• medial epicondyle of humerus

• Turns into palmar aponeurosis (attaches to palm)

Nerve

• median nerve

Action

• flex radiocarpal joint

• Flex palm inward

Flexor carpi ulnaris humeral head

Attachment

• medial epicondyle of humerus

• Pisifrom, hook of hamate, 5th metacarpal

Nerve

• ulnar nerve

Action

• Flex radiocarpal joint

• Ulnar deviation

Flexor carpi ulnaris ulnar head

Attachment

• olecranon and posterior border of ulnar

• Pisiform, hook of hamate, 5th metacarpal

Nerve

• ulnar nerve

Action

• flex radiocarpal joint

• Ulnar deviate

Flexor digitorum superfisialis

Attachment

• humeral head: medial epicondyle

• Radial head: oblique line of radius

• Middle phalanges of medial four digits

Nerve

• median nerve

Action

• flex radiocarpal joint

• Flex carpometacarpal joints

• Flex proximal phalange joints

Flexor digitorum profundus

Attahcment

• Medial, anterior, superior part of ulna

• Interosseous membrane

• Base of distal phalanges of digits 2-5

Nerve

• digit 2, 3 medial nerve

• Digit 4, 5 ulnar nerve

Action

• flex radiocarpal joint

• Flex carpometacarpal joints

• Flex distal interphalange joints

Flexor pollicis longus

Attachment

• anterior surface of radius and adjacent interosseous membrane

• Base of distal phalanx of thumb

Nerve

• anterior interosseous nerve, from median nerve

Action

• flex radiocarpal joint, carpometacarpal joint

• Flex thumb

Pronator quadratus

Attachment

• distal quarter of anterior surface of ulnar

• Distal quarter of anterior surface of radius

Nerve

• median nerve

Action

• pronate forearm