Anterior Axioppenedicular Muscles

Question 1

Pectoralis major- has two heads

PA
DA
N/S
A

Answer 1

Clavical head: anterior surface of medial 1/2 of clavical
Sternocostal head: anterior sternum, superior 6 costal cartilages (ribs)

Lateral lip of intertubercular groove

Lateral and medial pectoral nerve

Adducts and medially rotates humerus

Clavical head: flexes humerus
Sternocostal head: extends from flexed position

Question 2

Pectoralis minor

Lies deep to pec major

PA
DA
N/S
A

Answer 2

3rd -5th rib near their costal cartilage

Coracoid process

Medial pectoral nerve

Stabilises scapula by drawing it inferiorly and anteriorly on thoracic cage

Question 3

Subclavius

Small rouns muscle, protects underlying vessels and nerves during clavical fractures

PA
DA
N/S
A

Answer 3

Junction of 1st rib and costal cartilage

Inferior surface of middle third of the clavical

Nerve to subclavius

Anchors and depresses clavical

Question 4

Serratus anterior

PA
DA
N/S
A

Answer 4

External surface of lateral part of ribs 1 -8

Anterior surface of medial border of scapula

Long thoracic nerve

Protracts scapula and holds it on thoracic wall, rotates scapula