Applied Anatomical Study for the Transverse Process Segment of Verebral Artery

Objective To provide anatomical basis for excision the transverse process segment of vertebral artery.Methods The courses,tracks,branches,outer diameters and length of the transverse process segment of vertebral artery were measured and observed on 40 sides of 20 fresh adult cadaverous specimens.Results The first segment of vertebral artery track in the osseofibrous sheath;The outside diameters at the middle point of this artery segment were 3.63±0.85mm(left) and 3.12±0.74mm(right) in male but 3.03±0.53mm and 2.98±0.84mm in female.The lengths of this artery segment were 61.20±6.80mm(left) and 61.60±5.30mm(right) in male but 59.70±5.80mm and 58.30±8.10mm in female.Conclusion The transverse process segment of vertebral artery shows a left side predomiance.The results have important reference value for the excision of vertebral artery.