Secondary tooling methods include trepanning, skiving and burnishing, pull boring, or bottle boring. Also the name for the surgery changed from trepanning to craniotomy. Dating back to Neolithic times, a skull operation called trepanning was sometimes performed. One cranium contained a large circular lesion which may have been the consequence of trepanning. It seems likely that trepanning was also performed purely for ritualistic or religious reasons. Some of the human skulls found here had trepanning (bored hole) marks. The practice of trepanning also continues today due to belief in various pseudoscientific medical benefits. Several of the skulls show marks of trepanning. One of the most prominent advocates of trepanning was Dutch librarian Bart Huges. Individuals have practiced non-emergency trepanning for psychological purposes. The procedure evolved from a primitive form of surgery known as trephining or trepanning. After a trepanning, she was released back into her mother's care. Some proponents claim that trepanning results in increased blood flow. The first known trepanning operation was carried out c. 5000 BC in Ensisheim, France. Trepanning was one of these methods used throughout history.