Lecture 12: Thorax & Breast Flashcards Preview

Structures > Lecture 12: Thorax & Breast > Flashcards

Flashcards in Lecture 12: Thorax & Breast Deck (22):
1

Direction of 3 Intercostals

External (hands in pockets) Internal (Hands up shirt) Innermost (More Horizontal than Internal)

2

Action of Intercostals

To assist in Respiration, the externals help raise the ribs

3

Why are only deep back muscles innervated by dorsal Rami

Because the superficial and intermediate back muscles used to be on the side of the body evolutionarily/developmentally, when they migrated they dragged the ventral rami with them

4

Thoracic Dermatomes, specific landmarks

Cover Ventral and dorsal surface of the abdomen and thorax. The dermatomes slope down towards the ventral side bc the spinal nerves pass down through the intercostal groove, which also slopes down ventrally.
Nipples --> T4
zyphoid process --> T6
Bellybutton --> T10

5

Where to place chest tube

On superior side of inferior rib, in intercostal groove

6

V,A,N

Vein, Artery, Nerve, from superior to inferior. Vein drains into Azygos, Artery arises from aorta, and nerve arises from intervertebral foramen

7

Intercostal anastomoses

Ascending aorta --> subclavian --> internal thoracic --> anterior intercostals --> posterior intercostals --> descending aorta

8

Epigastric anastomoses

Internal thoracic --> Superior epigastric artery --> Internal epigastric artery --> external iliac --> common iliac --> descending aorta --> ascending aorta --> subclavian --> internal thoracic

9

blood supply of breast

Internal (medially) and lateral (laterally) thoracic arteries

10

Lymphatic drainage of thorax

Above umbilicus to axillary nodes (armpit) below umbilicus to inguinal nodes (pelvis)

11

Male breast enlargement

Gynecomastia --> hormone imbalance

12

Mammary gland

Modified sweat gland

13

Tail of spence

the superio-lateral end of mammary gland

14

In what fascia is the breast located

The superficial fascia, considered a skin gland

15

Retromammary space

Loose connective tissue space that separates the breast tissue/mammary gland from the deep pectoral fascia

16

Montgomery's glands

Look like goose-bumps on areola, lubricate the nipple to prevent chapping

17

nipple erection

Contraction of smooth muscle under skin

18

Coopers Ligaments

Suspend breast tissue from underlying fascia, comparmentalize glandular tissue from surrounding fat

19

Prevalence of breast cancer in women and men

1 in 8 women, 1% of all cancers in men

20

Breast Cancer placement

In the axillary region, as the lymphatic drainage will take cells there

21

Mammary Gland function

Makes milk
Arranged in lobes radially around nipple, lobes lead to lactiferous ducts that channel milk towards the nipple, Milk is stored in lactiferous sinuses until lactation

22

Colostrum

Pre-milk, contains maternal antibodies that provide immunity to baby during breast-feeding