Elbow, Upper arm and chest muscles

Biceps Brachii

blue star

Brachialis

green star

Triceps brachii

blue star

Anconeus

silver star

Deltoid

gold star

Coracobrachialis

upper silver star

Coracobrachialis

A-shoulder flexion and adduction

O-coracoid process of scapula

I-medial surface of humerus

Deltoid anterior

A-shoulder flexion, inetrnal rotation

O-clavicle

I-deltoid tuberosity

Deltoid Middle

A-shoulder abduction

O-acromion process of scapula

I-deltoid tuberosity of humerus

Deltoid Posterior

A-shoulder extension, external rotation

O-spine of scapula

I-deltoid tuberosity of humerus

Anconeus

A-muscle of the elbow that assists in extension of the forearm. O-lateral epicondyle of humerus. I-olecranon process of ulna.

Triceps Brachii

A-elbow extension

O-posterior surface of humerus

I-olecrano process of ulna Tr

Triceps Brachii Long head

A- ass. in shoulder extension and elbow extension

O-infraglenoid tubercle of scapula

I- olecranon process of ulna

Brachialis

A muscle located beneath the biceps brachii that primarily flexes the elbow. O-anterior surface of the humerus. I-coronoid process of ulna.

Biceps Brachii

A muscle on the front of the upper arm that flexes the elbow and supinates the forearm. O- scapula; I- radial tuberosity.