ES 553- elbow muscles (AOIN)

brachialis

brachioradialis

extensor carpi ulnaris

anconeus

pronator teres

pronator quadratus

supinator

extensor carpi radialis longus

extensor carpi radialis brevis

flexor carpi ulnaris

brachialis origin and insertion

O: distal half of anterior surface of humerus

I: tuberosity and coronoid process of ulna

brachioradialis origin and insertion

O: proximal 2/3 of the lateral supracondylar ridge of humerus

I: styloid process of radius

extensor carpi ulnaris origin and insertion

O: common extensor tendon from the lateral epicondyle of humerus

I: base of fifth metacarpal

anconeus origin and insertion

O: lateral epicondyle of the humerus

I: olecranon process, posterior proximal surface of ulna

pronator teres origin and insertion

O: common flexor tendon from medial epicondyle of humerus, coronoid process of the ulna

I: middle of lateral surface of the radius

pronator quadratus origin and insertion

O: medial anterior surface of distal ulna

I: lateral anterior surface of distal radius

supinator origin and insertion

O: lateral epicondyle of humerus, radial collateral ligament, annular ligament, supinator crest of the ulna

I: anterior lateral surface of proximal 1/3 of radial shaft

extensor carpi radialis longus origin and insertion

O: distal 1/3 of the lateral supracondylar ridge of humerus

I: base of 2nd metacarpal

extensor carpi radialis brevis origin and insertion

O: common extensor tendon from the lateral epicondyle of humerus

I: base of 3rd metacarpal

flexor carpi ulnaris origin and insertion

humeral head- O: common flexor tendon from medial epicondyle of humerus

ulnar head- posterior surface of proximal 2/3 of ulna

I: pisiform, hook of hamate, base of 5th metacarpal

brachialis action

flex the elbow (humeroulnar joint)

brachioradialis action

-flex the elbow (humeroulnar joint)

-assist to pronate and supinate the forearm when these movements are resisted

extensor carpi ulnaris action

-extend the wrist (radiocarpal joint)

-adduct the wrist

anconeus action

extend the elbow (humeroulnar joint)

pronator teres action

-pronate the forearm (radioulnar joints)

-assist to flex the elbow (humeroulnar joint)

pronator quadratus action

pronate the forearm (radioulnar joints)

supinator action

supinate the forearm (radioulnar joints)

extensor carpi radialis longus and brevis action

-extend the wrist (radiocarpal joint)

-abduct the wrist

-assist to flex the elbow (humeroulnar joint)

flexor carpi ulnaris action

-flex the wrist (radiocarpal joint)

-adduct the wrist

-assist to flex the elbow (humeroulnar joint)

brachialis nerve innervation

musculocutaneous n. (with a small branch from radial n.)

brachioradialis nerve innervation

radial n.

extensor carpi ulnaris nerve innervation

radial n.

anconeus nerve innervation

radial n.

pronator teres nerve innervation

median n.

pronator quadratus nerve innervation

median n.

supinator nerve innervation

radial n.

extensor carpi radialis longus and brevis nerve innervation

radial n.

flexor carpi ulnaris nerve innervation

ulnar n.