Trepanation is a fascinating procedure in which a hole is drilled into the skull of a live person in order to expose the dura mater. I could not believe it but back in neolithic times this hole would be pierced with a flint stone. One would wonder whether or not there was any logical reason behind such an egregious practice to make it medicinally viable. But apparently, it is a very old surgical procedure used to cure many ailments like epilepsy, migraine and vapourisation of the evil spirits in order to treat mental illness.
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