Fig. 6From: Use of bone landmarks for assessing the safety of acupuncture on the posterior midline of the neck regionComparison of the mean measured data from lateral cervical radiographs. The superior border of C1 in a female is greater than that in a male, the other values are lower in females than those in males, and the distance from the inferior border of C4 in females is close to that in males. SB: superior border; IB: inferior border; F: female; M: maleBack to article page