A&P Muscles of the Upper Extremity

Biceps Brachii origin

short head: coracoid process of scapula

long head: supraglenoid tubercle of scapula

biceps brachii insertion

tuberosity of radius

biceps brachii action

flexion at elbow; supinates forearm

biceps brachii innervation

musculocutaneous nerve

brachialis origin

anterior surface of humerus

brachialis insertion

tuberosity of ulna

brachialis action

flexion at elbow.

brachialis innervation

musculocutaneous nerve.

brachioradialis origin

lateral epicondyle of humerus

brachioradialis insertion

styloid process of radius

brachioradialis action

flexion at elbow

brachioradialis innervation

radial nerve

triceps(Lateral head, long head, medial head) origin

Lateral Head- Superior, lateral margin of humerus

Long head- infraglenoid tubercle of scapula

Medial head- posterior surface of humerus

Triceps insertion

olecranon of ulna

triceps action

extension at elbow

triceps innervation

radial nerve

Pronator Teres origin

medial epicondyle of humerus

Pronator teres insertion

mid-lateral surface of radius

pronator teres action

pronation

pronator teres innervation

median nerve

supinator origin

lateral epicondyle of humerus

supinator insertion

anterolateral surface of radius

supinator action

supination

supinator innervation

deep radial nerve

Pronator quadratus origin

distal ulna

Pronator quadratus insertion

distal radius

Pronator quadratus action

pronates forearm

Pronator quadratus innervation

median nerve