Pectoral Region Anatomy

Question 1

Boundaries of the breast

Answer 1

From rib 2 to 6

From sternum to axillary line

Question 2

Pectoral region

Answer 2

External to anterior thoracic wall
Superficial compartment contains skin, superficial fascia, and breasts
Deep compartment contains pec major and minor, and subclavius muscle

Question 3

Retromammary space

Answer 3

Behind the mammary gland

Between superficial and deep fascia

Question 4

Axillary process/tail

Answer 4

When the glandular tissue of the breast can move up and into the axilla

Question 5

Breast is innervated by which nerves?

Answer 5

2nd to 6th intercostal nerves

Question 6

Nipple is innervated by which nerve?

Answer 6

4th intercostal nerve

Question 7

Blood supply to the breast

Answer 7

Axillary artery
Internal thoracic (anterior intercostal)

Question 8

Lymphatic drainage of the breast

Answer 8

Axilla and parasternal lymph nodes

Also partially the abdominal ones

Question 9

Cephalic vein

Answer 9

Between the deltoid and the pectoralis major (deltopectoral groove)

Question 10

Subclavius

Answer 10

Rotates the clavicle when you bring your arm above your head

Question 11

Serratus anterior

Answer 11

Main protractor of the scapula

Can elevate it too

Question 12

Pectoralis minor

Answer 12

Protraction of the scapula