TAP Lab 2

internal thoracic (mammary) artery

- come off subclavian run down sternum to innervate or BS to medial breast or mammary glands and held in place by transverses thoracics muscles - about 6th rib it splits to form superior epigastic and musculophrenic artery also has some anterior intercostals that will overlap with posterio intercostals

intercostal muscles

- external in purple - internal in blue - X is membrane

medial pectoral nerve

- medial cord of brachial plexus - enters pec minor deep and pec major - medial doing minor and major - in green is the medial pectoral nerve in blue is lateral cord - first cord coming off medial will pierce pec minor other cords run off to arm

subcostales

- posterior wall - stars in pictures - same plane as innermost intercostal msucles but not in intercostal space span from rib to rib -

diffrent view

1- pec major 2- pec minor 3- medial pectoral nerve coming out of pec minor to pec major 4-lateral pectoral nerve branching and faning underside of pec major 5- clavicle

transversus thoracis

anterior thoracic wall - radiates to ribs from internal surface of sternum - hold internal thoraci vessles in place

breast

areola - red nipple- blue lactiferous duct - green suspensory ligament of breast - purple dermis to pec

internal intercostals

in purple inferior anf later fibers

pectoralis minor

origin ribs insertion coracoid process

subclavius

padding - holds sternoclavicualr head to manubrium etc.

lateral pectoral nerve

pectoralis major innervation - lateral cord of brachial plexus - lateral pectoral nerve in blue and comes down dashed sitting on pec minor but not innervating it - clavicle is removed but if in place lateral nerve will run under and fan underside of pec major

pectoralis major

red line by deltoid is the = boundary bewteen PM and deltoid called the deltopectroal groove that is where cephalic vein will run - clavicular head in blue - sternocostal head in green and will hit apernerosis of external oblique - insert lateral lip of interturbercular groove

external intercostals

thick posterioly thin and stop anteriorly in red is external instercostals and in purple is the membrane