Pectoral Region, Axilla, and Anterior Compartment of Arm

Question 1

Pectoralis Major
Blood supply:
Nerve Supply:
Action:

Answer 1

Pectoralis Major
Blood supply: Thoracracromial artery
Nerve Supply: Medial and lateral pectoral nerve
Action: Adduct, medially rotate, flex arm

Question 2

Pectoralis Minor
Blood supply:
Nerve Supply:
Action:

Answer 2

Pectoralis Minor
Blood supply: Thoracroacromial artery
Nerve Supply: Medial pectoral nerve
Action: Protract and press against scapula

Question 3

Subscapularis
Blood supply:
Nerve Supply:
Action:

Answer 3

Subscapularis
Blood supply: Subscapular artery
Nerve Supply: Subscapular nerve
Action: Adduct and medially rotate arm

Question 4

Serratus anterior
Blood supply:
Nerve Supply:
Action:

Answer 4

Serratus anterior
Blood supply: Lateral thoracis artery
Nerve Supply: Long thoracic nerve
Action: Protract and rotate scapula upward

Question 5

Biceps Brachii (short and long head…long is on lateral side)
Blood supply:
Nerve Supply:
Action:

Answer 5

Biceps Brachii (short and long head…long is on lateral side)
Blood supply: Brachial artery
Nerve Supply: musculocutaneous (c5-c7)
Action: Flex arm, flex and supinate forearm. Best supinator of the arm.

Question 6

Coracobrachialis
Blood supply:
Nerve Supply:
Action:

Answer 6

Coracobrachialis
Blood supply: Brachial artery
Nerve Supply: Musculocutaneous (c5-c7)
Action:Flex and adduct arm

Question 7

Brachialis
Blood supply:
Nerve Supply:
Action:

Answer 7

Brachialis
Blood supply: Brachial artery
Nerve Supply: Musculocutaneous nerve (c5-c7)
Action: Flex forearm ONLY