Sacrum sacrovertebral angle, an angle of 30 degrees from the horizontal plane that provides a useful marker for a sling implant procedure. The pelvic surface of the sacrum is concave from the top, and curved slightly from side to side. Its middle part is crossed by four transverse ridges, which correspond to the original planes of separation between the five sacral vertebrae. The body of the first segment is large and has the form of a lumbar vertebra; the bodies of the next bones get progressively smaller, are flattened from the back, and curved to shape themselves to the sacrum, being
Traditional Chinese medicines derived from the human body pharmacopoeias continue to list human drugs. Within their sample of 8 human drugs, prescriptions mention two dozen symbolic ritual procedures (1973: 265). Sympathetic magic, for example, could explain using blood to treat blood loss (52.17.3 above) and attempting to treat bone damage with bone (52.27.1). Li Shizhen quotes the (9th century) "Miscellaneous Morsels from Youyang". The book "Youyang Zaju": Once a military man in Jingzhou had an injured tibia. Doctor Zhang Qizheng treated him with a kind of medicinal wine, which was taken orally. A small segment of broken bone in the wounded tibia was taken out and a kind