Abstract：Objective To observe and describe the anatomy of pterion, provide the reference data and precise positioning for clinical neurosurgery of pterional surgical approaches.Methods Fifty(100 sides) complete adult skull of Jilin city were selected to observe and describe double flank of pterion, surface marking and measure the length of pterion and the vertical distance from the superior border of the zygomatic arch to the center of the pterion, and the distance from the center of the pterion to the zygomatic process. Then the data were used to do statistical analysis.Results Pteria were categorized into four groups: phenoparietal, stellate, frontotemporal and epipteric. Among these 50 skulls, sphenoparietal were found 46 skulls, 84 sides(84%), there were large length “H” of 45 skulls, 80 sides(80%); short length “H” of 2 skulls, 2 sides(2%); “N” type of 2 skulls, 2 sides(2%). Frontotemporal were found 2 skulls, 2 sides (2%. Stellate were found 2 skulls, 2 sides(2%). Epipteric were found 10 skulls, 12 sides(12%).The length of pterion was(11.31±3.00)mm,(12.12±4.79)mm on the left and right sides, respectively. Both sides had no statistical significance (P>0.05); the vertical distance between pterion and the superior border of the zygomatic arch was (40.12±3.95)mm,(41.94±4.31)mm on the left and right sides, respectively. The difference was statistically significant on both sides(t=3.141, P<0.05); the vertical distance between pterion and the zygomatic process was (32.13±4.25)mm, (33.71±5.19)mm, on the left and right sides respectively, the difference on both sides was statistically significant(t=2.692, P<0.05).Conclusions To supplement the related data of the morphological feantures and local differences of the people's pterion in northeast China so as to provide relevant reference for pterion sugical approach.
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