Lower Arm

Rebecca Barker

Biceps brachii

Action: flexes elbow and supinates forearm

Origin: scapula of shoulder gridle

Insertion: Proximal radius

Brachialis

Origin: distal humerus

Insertion: Proximal ulna

Action: Flexes elbow

BrachioradialisOrigin: lateral supercondylar ridge on humerus

Insertion: styloid process of the radius

Action: Elbow flexion

Triceps Brachii

Origin: shoulder girdle and proximal humerus

Insertion: Olecranon process of ulna

Action: Extends elbow

Pronator teres

Origin: medial epicondyle of humerusInsertion:

distal/lateral radius

Action: forearm pronation

Hand

Flexor carpi radialis

Origin: Distal humerus (medial epicondyle)

Insertion: second and third metacarpals

Action: flexes wrist and abducts hand

Flexor Carpi ulnaris

Origin: distal humerus (medial epicondyle) and posterior ulna

Insertion: Carpals of wrist and fifth metacarpal

Action: flexes wrist and adducts hand

Extensor carpi radialis

Origin: distal humerus (lateral epicondyle)

Insertion: base of second and third metacarpals

Action: Extends wrist and abducts hand

Extensor carpi ulnaris

Origin: lateral epicondyle of humerus

Insertion: base of fifth metacarpal

Action: wrist extension and ulnar deviation.