Definition
Trephination is an ancient surgical procedure that involves drilling or scraping a hole into the skull. It's one of the oldest known surgical practices, dating back thousands of years. The reasons for trephination in ancient times are debated but may have included treating head injuries, relieving pressure on the brain, or even as a form of ritualistic healing. Think of it as a prehistoric form of brain surgery. Evidence of trephination has been found in archaeological sites around the world. Modern neurosurgery has advanced far beyond this practice, but its historical significance remains.