Elbow/Forearm muscle OIAI

elbow flexors and supinators

biceps brachii

brachialis

brachioradialis

supinator

elbow extensors and pronators

triceps brachii

anconeus

pronator teres/quadratus

Anconeus orgin

Posterior surface of the lateral condyle of the humerus

aconeus insertion

Lateral border of the olecranon process

aconeus action

extension of the elbow

Stabilization of ulna during pronation/supination

aconeus innervation

radial nerve, C7-C8

biceps brachii origin

short head: coracoid process of scapula

long head: supraglenoid tubercle of scapula

biceps brachii insertion

radial tuberosity

biceps brachii action

flexes elbow and shoulder; supinates forearm

biceps brachii innervation

Musculocutaneous nerve (C5, C6)

brachialis origin

Distal half of anterior surface of humerus

brachialis insertion

coronoid process and ulnar tuberosity

brachialis innervation

Musculocutaneous nerve (C5, C6)

brachialis action

flexes forearm

brachioradialis origin

lateral supracondylar ridge of humerus

brachioradialis insertion

radial styloid process

brachioradialis action

flexes forearm, forearm pronation

brachioradialis innervation

Radial nerve (C5, C6, C7)

extensor carpi radialis brevis origin

Lateral epicondyle via the common extensor tendon

Radial collateral ligament

extensor carpi radialis brevis insertion

base of 3rd metacarpal

extensor carpi radialis brevis action

wrist extension, radial deviation

extensor carpi radialis brevis innervation

radial nerve, C6-C7

extensor carpi radialis longus origin

lateral supracondylar ridge of humerus

extensor carpi radialis longus insertion

Radial side of the 2nd metacarpal

extensor carpi radialis longus action

extends and abducts wrist

extensor carpi radialis longus innervation

Radial nerve (C6, C7)

extensor carpi ulnaris origin

lateral epicondyle of humerus

extensor carpi ulnaris insertion

ulnar side of the base of the 5th metacarpal

extensor carpi ulnaris action

wrist extension, ulnar deviation

extensor carpi ulnaris innervation

Deep radial nerve (C6-C8)

extensor digitorum communis origin

lateral epicondyle of humerus

extensor digitorium communis insertion

Into the dorsal surface of the base of the middle and distal phalanges of each of the four fingers

extensor digitorium communis action

Wrist extension, MCP/PIP extension

extensor digitorum communis innervation

deep radial

flexor carpi radialis origin

medial epicondyle of humerus

flexor carpi radialis insertion

Palmar aspect of the bases of the 2nd and 3rd metacarpal bones

flexor carpi radialis action

Forearm pronation, Wrist flexion, Radial deviation and Elbow flexion

flexor carpi radialis innervation

Median nerve (C6, C7)

flexor carpi ulnaris origin

Humeral head: Medial epicondyle via the common flexor tendon

Ulnar head: Medial border of the olecranon; proximal two-thirds of the posterior ulna

flexor carpi ulnaris insertion

pisiform, hamate, 5th metacarpal

flexor carpi ulnaris action

wrist flexion, ulnar deviation, elbow flexion

supinator orgin

lateral epicondyle of humerus, RCL, crest of ulna

supinator insertion

proximal 1/3 of radius

supinator action

supinates forearm

supinator innervation

deep branch of radial nerve

triceps brachii orgin

Long head: Infraglenoid tuberosity of the scapula

Lateral head: Posterolateral surface of the proximal one-half of the humeral shaft

Medial head: Posteromedial surface of the humerus

triceps brachii insertion

olecranon process of ulna

triceps brachii action

extends forearm and shoulder extension

triceps brachii innervation

Radial nerve (C6, C7, C8)

pronator teres origin

medial epicondyle of humerus and coronoid process of ulna

pronator teres insertion

middle of lateral surface of radius

pronator teres action

pronates and flexes forearm

pronator teres innervation

Median nerve (C6, C7)

pronator quadratus origin

Distal 1/4 of anterior surface of ulna

pronator quadratus insertion

Lateral, anterior surface of distal radius

pronator quadratus action

pronates forearm

pronator quadratus innervation

anterior interosseous nerve (C8, T1)

palmaris longus origin

medial epicondyle of humerus

palmaris longus insertion

flexor retinaculum and palmar aponeurosis

palmaris longus action

flexes wrist

palmaris longus innervation

Median nerve (C6, C7)

flexor digitorium profundus orgin

Anteromedial proximal three-fourths of the ulna and associated interosseous membrane

flexor digitorum profundus insertion

bases of distal phalanges of digits 2-5

flexor digitorum profundus action

DIP flexion

PIP flexion

Wrist flexion

flexor digitorum profundus innervation

Lateral: Median nerve

Medial: Ulnar nerve C8-T1

flexor digitorum superficialis origin

medial epicondyle of humerus, coronoid process of ulna, anterior oblique line of radius

flexor digitorum superficialis insertion

middle phalanges of digits 2-5

flexor digitorum superficialis action

PIP flexion

MCP flexion

Wrist flexion