对100个颅骨的测量结果表明,乙状窦沟右侧较左侧粗大者多,但其前缘所处的位置两侧并无明显差异。乙状窦前移皆发生在上膝部,并同时伴有该部外移,出现率为6.5％,其中显著前移占1％。颞线显示率为87.5％,前、中段可以作为颅中凹底的参考标志。颅中凹下垂者均伴有乙状窦前移,出现率为1.5％。 The measurement results of 100 skulls showed that the right sigmoid sinus was larger than the left, but there was no significant difference between the two sides of the front edge. The sigmoid sinus anterior displacement occurred in the upper knee, accompanied by the Department of external relocation, the incidence was 6.5%, of which significant advance accounted for 1%. The temporal line showed a rate of 87.5%. The anterior and middle segments could serve as a reference mark for the concave base of the skull. Sagittal ptosis accompanied by sigmoid sinus anterior shift, the incidence was 1.5%.