Muscles of the Arm & Forearm

biceps brachii

Large muscle with 2 heads

FUNCTION:

-flexes forearm

-flexes arm

-supinates forearm

Brachialis

LOCATION: deep to biceps brachia; anterior to humerus

FUNCTION: flexes forearm

Triceps Brachii

large muscle with 3 heads

CONTENTS:

-Long head: superficial; medial side

-Medial head: deep; medial side

-Lateral head: lateral side

FUNCTIONS:

-extends forearm

-extend arm

Brachioradialis

large, superficial lateral muscle

FUNCTION:

-flexes forearm

-pronates forearm

supinates forearm

Pronator teres

LOCATION: next to brachioradialis

FUNCTION:

-pronates forearm

-flexes forearm (weakly)

Flexor carpi radialis

LOCAITON: medial and inferior to pronator teres; medial to brachioradialis in forearm

FUNCTION:

-flexes hand

-abducts hand

Palmaris longus

LOCATION: medial to flexor carpi radialis

FUNCTION:

-flexes wrist (weakly)

flexor carpi ulnaris

most medial muscle of posterior forearm

FUNCTION:

-flexes hand

-adducts hand

Flexor digitorum superficialis

LOCATION: deep to tendons of flexors, palmaris,

FUNCTION:

-flexes hand,

-flexes proximal and middle phalanx of each finger

extensor carpi unlaris

LOCATION: lateral to flexor carpi ulnaris

FUNCTION:

-adducts hand

-extends hand

extensor digitorum minimi

LOCATION: lateral to extensor carpi ulneris

FUNCTION:

-extends hand

-extends proximal phalanx of 5th digit

extensor digitorum

LOCATION: lateral to extensor digitorum minim

FUNCTION:

-extends hand

-extends proximal, middle and distal phalanges

Extensor carpi radialis brevis

LOCATION: lateral to extensor digitorum

FUNCTION:

-extends hand

-abducts hand

Extensor carpi radialis longus

LOCATION: lateral to extensor radialis brevis

FUNCTION:

-extends hand

-abducts hand