Pectoral Region Flashcards
Exam 1, MGA, Lecture 9
Which ribs are the true ribs?
1-7
Which ribs are the false ribs?
8-10
Which ribs are the floating ribs?
11-12
What is the clavopectoral fascia?
covers the subclavius muscle and wraps around the pectoralis minor
What is the axillary fascia?
forms the floor of the axilla
What are the functions of fascia?
fibrous covering of a muscle
protect muscles from infection
What are the four special types of deep fascia in the pectoral region?
Camper’s fascia
clavipectoral fascia
pectoral fascia
axillary fascia
What defines the deltoclavopectoral triangle?
bound by pectoralis major, deltoid, and clavicle
What two structures run inside the deltoclavopectoral groove?
deltoid branch of thoracoacromial artery
cephalic vein
What is the origin of the thoracoacromial artery?
axillary artery
What are the four branches of the thoracoacromial artery?
pectoral
acromial
clavicle
deltoid
What is the mnemonic for the thoracoacromial artery?
PACD pectoral acromial clavicle deltoid
What is the importance of the T4 level?
superior and inferior mediastinum divisions
branching of the trachea into bronchi
sternal angle
What structure does the cephalic vein drain into?
axillary vein
What is the dermatome for the nipple line?
T4
What is the origin of the lateral thoracic artery?
axillary artery
What are the two branches of the axillary artery?
lateral thoracic artery
thoracoacromial artery
What structure does the lateral thoracic artery supply?
serratus anterior
What is the only superficial nerve in the body?
long thoracic nerve
The deltoid branch of the thoracoacromial artery is deep to which vein?
cephalic vein
What portion of the arm does the cephalic vein drain?
lateral arm
What is the difference between the suspensory ligaments and lactiferous ducts?
suspensory ligaments go towards the skin and lactiferous ducts towards the nipple
What are symptoms of breast cancer?
- orange peel appearance
- inversion of nipple
- adenopathy (drains to axillary lymph node)
- secretion
What are symptoms of breast cancer?
- orange peel appearance
- inversion of nipple
- adenopathy
- thickening of skin
- palpable lump
- secretion
What is the cause of orange peel skin in the breast?
invasion of Cooper’s ligaments
What are the areolar glands also called?
glands of Montgomery
What do areolar glands secrete?
oily lubricant
What are the glands in the lobules called?
tubuloalveolar glands
What is the function of lactiferous ducts?
drain each lobule
What is the function of the lactiferous sinuses?
where milk accumulates
How many ducts open onto the surface of the nipple?
15-20
What is the action of the subclavius?
anchor and depress clavicle (SUBclavius)
What is the origin of the subclavius?
1st rib
What is the insertion of the subclavius?
interior surface of the clavicle (SUBclavicle)
