Axilla and Pectoral Region Flashcards Preview

Exam 3- Anatomy > Axilla and Pectoral Region > Flashcards

Flashcards in Axilla and Pectoral Region Deck (72)
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1

osteological structures of pectoral region

clavicles
sternum
ribs
scapula
humerus

2

three parts of the sternum

manubrium
body
xiphoid

3

where do the ribs articulate?

thoracic vertebrae and some sternum

4

which ribs are atypical?

1, 2, 11, 12

1 and 2 are shorter than regular ribs and 11 and 12 are floating

5

which ribs are the true ribs?

1-7

6

which ribs are false ribs?

8-10

they merge with the cartilage of 7 then merge with sternum

7

point to your jugular notch

on sternum, top middle

8

sternal angle

where the second rib attaches

9

bilateral glandular structures found in both males and females

breast

10

modified sweat glands of the breast are called

mammary glands

11

where does the breast rest?

on the pectoral fascia (above the pectoralis major)

12

potential space between breast and pectoral fascia is the

retromammary space

13

what nerves innervate the breast?

4th-6th intercostal nerves

14

what attaches the breast tissue to the dermis of the skin?

suspensory ligaments

15

where do the mammary gland lobules converge?

the nipple

16

what arteries supply the breasts?

mammary branches from anterior intercostal, lateral thoracic and internal thoracic arteries

17

what veins drain the breast?

axillary vein via thoracic vein and medial mammary veins
some drainage to internal thoracic vein via intercostal veins

18

why is lymphatic drainage of the breast particularly clinically relevant?

due to high amounts of breast cancers and its role in their metastasis

19

what lymphatic drainage is used for the nipple. areola, and lactiferous lobules?

subareolar lymph nodes

20

greater than 75% of lymph from the breast is drained by what?

axillary lymph nodes (pectoral, central, apical)

21

what drains the remaining lymph (last 25%) of the breast?

parasternal and abdominal lymph nodes

22

what innervation exists at the breast tissue?

anterior and lateral branches of 4-6th intercostal nerves

also some supraclavicular nerve branches

23

what does the fascia of the pectoral region consist of?

superficial and deep layers that define borders, invest muscles and create potential spaces

24

superficial fascia of the pectoral region is composted of

platysma
supraclavicular nerves
anterior and lateral branches of intercostal nerves

25

what composes the deltopectoral triangle?

deltoid, pectoralis major, and middle clavicle
cephalic vein
deltopectoral lymph nodes
deltoid branch of thoracoacromial artery

26

what's the function of the clavipectoral fascia?

invests subclavius and pectoralis major
attaches clavicle and anterior thoracic wall
perched by lateral pectoral nerves, cephalic vein, and thoracoacromial artery
becomes suspensory ligament of axilla

27

what are the muscles of the pectoral region?

pectoralis major
subclavius
pectoralis major
serratus anterior

28

proximal attachments of pectoralis major

clavicular and sternocostal attachment

anterior surface of medial 1/2 of clavicle
ant. surface of sternum and superior 6 costal cartilages

29

distal attachment of pectoralis major

lateral lip of intertuburcular sulcus

30

actions of pectoralis major

adducts and medial rotation of humerus
draws scapula anteriorly and inferiorly (via clavicle)
flexes humerus (clavicular portion)
sternal person extended humors while it is flexed