Brachial (Arm) Muscles

Biceps Brachii Innervation

musculocutaneous

Triceps Brachii Artery

branch of profunda brachi artery

Brachialis Insertion

coronoid process and tuberosity of ulna

Brachialis Origin

distal half of anterior surface of humerus; intermuscular septa

Anconeus Action

extends forearm

Triceps Brachii Action

extends forearm at elbow; long head also extends arm

Coracobrachialis Action

flexes and adducts arm at shoulder

Biceps Brachii Action

flexes and supinates forearm at elbow; flexes arm

Brachialis Action

flexes forearm at elbow

Anconeus Origin

lateral epicondyle of humurus

Anconeus Insertion

lateral side of olecranon; upper posterior surface of ulna

Triceps Brachii Origin

long head: infraglenoid tubercle of scapula; lateral head: upper 1/2 of posterior humerus above and lateral to groove of radial nerve; medial head: posterior surface of humerus below and medial to the groove of the radial nerve

Biceps Brachii Origin

long head: supraglenoid tubercle of scapula; short head: tip of coracoid process of scapula

Coracobrachialis Insertion

middle 3rd of medial surface of humerus

Biceps Brachii Artery

muscular branches of brachial artery

Coracobrachialis Artery

muscular branches of brachial artery

Coracobrachialis Innervation

musculocutaneous

Brachialis Innervation

musculocutaneous; lateral side may receive twig from radial

Triceps Brachii Insertion

posterior surface of olecranon process of ulna

Anconeus Innervation

radial

Triceps Brachii Innervation

radial nerve

Brachialis Artery

radial recurrent artery; muscular branches of brachial artery

Biceps Brachii Insertion

radial tuberosity; fascia of forearm via bicipital aponeurosis

Coracobrachialis Origin

tip of coracoid process of scapula