Pectoral Region

Question 0

Pectoralis minor

Answer 0

O: ribs 3-5 (near costal cartilage)
I: coracoid process
N: medial pectoral n (C8, T1)
V: pectoral branch of thoracoacromial trunk
A: stabilizes scapula

Question 1

Pectoralis major

Answer 1

O: clavicular- anterior medial clavicle/sternocostal- anterior sternum superior six costal cartilages, external oblique aponeurosis
I: lateral intertubercular sulcus
N: lateral and medial pectoral nerves (C5,6,7,8, T1)
V: pectoral branch of thoracoacromial trunk
A: adducts & medically rotates humerus, draws scapula anteriorly and inferiorly

Question 2

Subclavius

Answer 2

O: 1st rib and costal cartilage junction
I: middle inferior clavicle
N: nerve to subclavius (C5,6)
V: clavicular branch of thoracoacromial artery
A: anchors and depresses clavicle

Question 3

Serratus anterior

Answer 3

O: external lateral ribs 1-8
I: medial anterior border of scapula
N: long thoracic n (C5,6,7)
V: circumflex scapular a
A: protracts, rotates, and anchors scapula