The anterior opening of the pterygoid canal was located behind the sphenopalatine foramen and had a round infundibular shape. The openings were about 3 mm in the transverse diameter and passed through by the vidian nerve and the pterygoid artery. 翼管前口位于蝶腭孔后方约7mm,呈圆形漏斗状,横径约3mm,略向外下方开口,距离鼻小柱平均71.72mm,有翼管神经和翼管动脉穿过。