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I wonder if any of the fine medical minds out there could help me out - I'm trying to list the blood supply for the deep muscles of the back (splenius, erector spinae and transversospinalis). The angiology section in Gray's isn't making any sense, it doesn't really give you much of a clue which artery goes where.
Can anyone fill me in on this, or reccomend some books or websites or summat?
Just one thing though, for example erector spinae:
Written by: UAMS webpage
supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
what do the a. and aa. mean? I presume artery in the first case (deep cervical artery comes off the bracheocephalic artery somehere deep to the clavicle right?) but what about the aa.? Does that signify an artery that comes straight off the aorta?