ABSTRACT
The positional relation between the dorsal sacral foramina and a needle inserted in the point “T, ze-Liao” according to the method of Takenouchi-Hamazoe, and the projection positions of the respective foramina to the body surface were anatomically and bilaterally examined using fifteen cadavers. The results were as follows. (1) The needles inserted in the point “T, ze-Liao” missed the second dorsal sacral foramen caudally or latero-caudally in many cases. (2) In the mediolateral direction, the first to fourth dorsal sacral foramina were located in the middle zone between the dorsal median line and the posterior superior iliac spine. (3) In the rostro-caudal direction, the first dorsal sacral foramen were, approximately located at the same level as that of the posterior superior iliac spine. The second to fourth foramina corresponded to three points which divided the rostro-caudal distance between the posterior superior iliac spine and the sacral cornua equally into four.