Muscles of the Arm

Coracobrachialis Origin

coracoid process of the scapula

Coracobrachialis Insertion

mid-medial humerus

Coracobrachialis Action

shoulder flexion and medial rotation

Coracobrachialis Innervation

musculocutaneous nerve

Biceps Brachii Long Head Origin

superior margin of the glenoid cavity

Biceps Brachii Short Head Origin

coracoid process of the scapula

Biceps Brachii Insertion

radial tuberosity

Biceps Brachii Action

supination of forearm

elbow flexion

weak shoulder flexor

stabilization of shoulder

Biceps Brachii Innervation

musculocutaneous nerve

Brachialis Origin

anterior distal humerus

Brachialis Insertion

coronoid process of the ulna

Brachialis Action

elbow flexion

Brachialis Innervation

musculocutaneous and radial nerves

Triceps Brachii Long Head Origin

inferior margin of glenoid

Triceps Brachii Medial Head Origin

posterior humerus

Triceps Brachii Lateral Head Origin

posterior proximal humerus

Triceps Brachii Insertion

olecranon process

Triceps Brachii Action

elbow extension

long head will extend and ADD humerus

Triceps Brachii Innervation

radial nerve

Anconeus Origin

lateral epicondyle of humerus

Anconeus Insertion

lateral aspect of olecranon

Anconeus Action

extend elbow

Anconeus Innervation

radial nerve