10/7 Pectoral and Axillary Region - Carter (Completed)

Question 1

Where would you find the nipple of a male?

Answer 1

between the 4th intercostal space

Question 2

What muscle is a muscle of facial expression extending from the mandible to upper thorax?

Answer 2

Platysma m.

Question 3

What innervates the skin of the 1st and 2nd intercostal space?

Answer 3

supraclavicular nerves (C3 - C4)

Question 4

What innervates skin over the intercostal spaces of T1 - T7?

Answer 4

intercostal nerves (T1 - T7)

Question 5

What is responsible for draining milk from mammary glands?

Answer 5

15 - 20 lactiferous ducts

Question 6

What arteries supply the female breast?

Answer 6

lateral thoracic artery

intercostal artery

internal thoracic artery

Question 7

Within the female breast where does 75% of lymph travel to?

Answer 7

goes to pectoral nodes which drains to axillary nodes

Question 8

Where does the Pectoralis Major m. originate from and insert into? What innervates it? What is its action?

Answer 8

Origin: CSC
Clavicle
Sternum
Costal cartilages

I –> humerus

Nerve:
Lateral Pectoral n.
Medial pectoral n. (lower portion)

Action:
Adducts arm (humerus)
Medially rotates arm (humerus)

Question 9

Where does the Pectoralis minor m. originate from and insert into? What innervates it? What is its action?

Answer 9

O –> ribs 2-5 or 3-6.

I –> coracoid process of scapula

N –> medial pectoral n.

Actions:
Depression of scapula
Downward rotation of scapula