Muscles of Anterior Arm OINA

Question 1

Coracobrachialis

Answer 1

O: coracoid process

I: mid-medial border of humerus

N: musculocutaneous

A: adduct and flexes arm

Question 2

Biceps Brachii

Answer 2

O: Long head - supraglenoid fossa
O: short head - coracoid process

I: radial tuberosity, bicipital aponeurosis

N: musculocutaneous

A: flex and supinate forearm; flex and adduct arm

Question 3

Brachialis

Answer 3

O: inferior 2/3 of ant surface of humerus

I: coronoid process of ulna

N: musculocutaneous

A: flex forearm

Question 4

Triceps Brachii

Answer 4

O: 3 heads
- long: medial border of scapula
- lateral: posterior surface of humerus
- medial: posterior surface of humerus

I: olecranon process of ulna

N: radial

A: extends forearm, extends and adducts arm, elbow flexion