Flashcards in Axilla and Pectoral Region Deck (72)
osteological structures of pectoral region
three parts of the sternum
where do the ribs articulate?
thoracic vertebrae and some sternum
which ribs are atypical?
1, 2, 11, 12
1 and 2 are shorter than regular ribs and 11 and 12 are floating
which ribs are the true ribs?
which ribs are false ribs?
they merge with the cartilage of 7 then merge with sternum
point to your jugular notch
on sternum, top middle
where the second rib attaches
bilateral glandular structures found in both males and females
modified sweat glands of the breast are called
where does the breast rest?
on the pectoral fascia (above the pectoralis major)
potential space between breast and pectoral fascia is the
what nerves innervate the breast?
4th-6th intercostal nerves
what attaches the breast tissue to the dermis of the skin?
where do the mammary gland lobules converge?
what arteries supply the breasts?
mammary branches from anterior intercostal, lateral thoracic and internal thoracic arteries
what veins drain the breast?
axillary vein via thoracic vein and medial mammary veins
some drainage to internal thoracic vein via intercostal veins
why is lymphatic drainage of the breast particularly clinically relevant?
due to high amounts of breast cancers and its role in their metastasis
what lymphatic drainage is used for the nipple. areola, and lactiferous lobules?
subareolar lymph nodes
greater than 75% of lymph from the breast is drained by what?
axillary lymph nodes (pectoral, central, apical)
what drains the remaining lymph (last 25%) of the breast?
parasternal and abdominal lymph nodes
what innervation exists at the breast tissue?
anterior and lateral branches of 4-6th intercostal nerves
also some supraclavicular nerve branches
what does the fascia of the pectoral region consist of?
superficial and deep layers that define borders, invest muscles and create potential spaces
superficial fascia of the pectoral region is composted of
anterior and lateral branches of intercostal nerves
what composes the deltopectoral triangle?
deltoid, pectoralis major, and middle clavicle
deltopectoral lymph nodes
deltoid branch of thoracoacromial artery
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
what are the muscles of the pectoral region?
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
distal attachment of pectoralis major
lateral lip of intertuburcular sulcus