Evolving story: trepanation and self-trepanation to enhance brain function.

Trepanation has been performed by people interested in enhancing mental power and well-being since the early 1960s. The pioneers and main proponents of the procedure are described here. The phenomenon appeared in Europe after a Dutch former medical student published a psychoactive drug-friendly scroll suggesting trepanation as a form of permanently increasing cerebral blood volume and function. He trepanned himself in 1965. Three of his friends became enthusiasts. They also submitted themselves to the procedure and published films and books describing their experiences. Two of them coauthored papers, in collaboration with Russian researchers, and created institutions to promote discussion on trepanation. One of these institutions organized trips to Central and South America to get the operation done. Dozens of people nowadays look for trepanation as a method of spiritualization and increasing well-being and mental power. The phenomenon has an uncertain future, however, as the main proponents and supporters are aging.