Muscles 4a Upper Arm

Biceps brachii, arrows pointing to long and short heads

• O: (Short) coracoid process
• (Long) Supraglenoid tubercle

I: radial tuberosity

A: Flex elbow, supinate forearm

Brachialis

O:humerus

I: coronoid process

A: Flexes Elbow

Brachioradialis

O: Humerus

I: radius, above styloid process

A: flexes elbow

Pronator Teres

O: Humerus, ulna

I: Radius, mid-lateral surface

A: Pronates forearm

Triceps brachii (3)

O: infraglenoid tubercle (1)/humerus (2)

I: Olecranon process

A: Extends elbow