OINA: Chest/Biceps

Question 1

Pectoralis Major

Answer 1

O: Clavicle, Sternum, and Upper 6 Costal Cartilages

I: Lateral Lip of Bicipital Groove

N: Medial and; Lateral Pectoral Nerve: C5, C6, C7, C8, T1

A: Adducts arm and rotate it medially; Clavicular fibers also flex arm

Question 2

Pectoralis Minor

Answer 2

O: 3rd, 4th, and 5th ribs

I: Coracoid process of scapula

N: Medial Pectoral Nerve: C6,C7,C8

A: Depresses point of shoulder and if scapula is fixed, it elevates the ribs of origin

Question 3

Serratus Anterior

Answer 3

O: Upper 8 ribs

I: Medial border and nferior angle of scapula

N: Long Thoracic Nerve: C5,C6,C7,

A:: Draws the forwards anterior around the thoracic wall; Rotates scapula

Question 4

Subclavius

Answer 4

O: 1st Costal Cartilage

I: Clavicle

N: Nerve to subclavius: C5,C6

A: Depresses clavicle and steadies it during the movement of the shoulder girdle

Question 5

Biceps Brachii

Answer 5

O: Long Head - Supraglenoid tubercle of Scapula
Short Head - Coracoid Process of Scapula

I: Radial Tuberosity and Bicipital aponeurosis into deep fascia of forearm

N: Musculocutaneous Nerve C5,C6

A: Supinator of forearm and floor of elbow jt.: weak flexor of shoulder jt.

Question 6

Brachialis

Answer 6

O: Front of lower half of humerus

I: Coronoid process of Ulna

N: Musculocutaneous: C5,C6

A: Flexor of elbow jt.

Question 7

Coracobrachialis

Answer 7

O: Coracoid process of scapula

I: Medial aspect of shaft of humerus

N: Musculocutaneous nerve: C5,C6,C7

A: Flexes arm and also a weak adductor

Question 8

Structures passing through the Anterior Compartment of the Arm

Answer 8

• Musculocutaneous, Median, and ulnar nerves
• Brachial Artery
• Basilic Vein
• Radial nerve is present in the lower part of the compartment