Editing Neck (section)

=== '''Subclavian     artery''' ===

** Asymmetric paired arteries      that supply blood to the posterior cervical circulation, cerebellum,      posterior neck, upper limbs and the chest wall
** Origin
*** Right: terminal branch of       the brachiocephalic artery
*** Left: third branch of the       aortic arch
** Course
*** Exits the thorax via the       superior thoracic aperture between the anterior and middle scalene       muscles
*** Then passes between the       first rib and clavicle to continue as the axillary artery
** Parts
*** The vessel can be split       into three parts depending on the position in relation to scalenus       anterior
*** First part (origin to       medial border scalenus anterior)
**** Vertebral artery, coursing        cranially, arising from posterior/superior aspect
***** Ascends behind CCA for         3cm before entering the foramen of the transverse process of C7
***** Stellate ganglion tends         to lie behind it
**** Internal thoracic artery,        coursing caudally, from inferior surface
***** See separate topic under         'thoracic cavity'
**** Thyrocervical trunk, which        divides into four branches, from superior surface, opposite internal        thoracic origin
***** Inferior thyroid
***** Suprascapular
***** Transverse cervical
***** Ascending cervical
*** Second part (posterior to       scalenus anterior, as much as 2cm above clavicle)
**** Costocervical trunk, which        courses cranially before bifurcating into superior intercostal and deep        cervical
*** Third part (from the       lateral border of scalenus anterior to lateral border of first rib)
**** Dorsal scapular artery,        which courses posteriorly to join the scapular anastomosis
** Branches
*** VIT C, D
*** Very Indignant Tired       Individuals Sip Tasty Almond Coffee Served Double Daily (including       branches)
** Variants
*** Aberrant right subclavian -       arteria lusoria


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