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During prehistoric times trepanation (trepanning) was carried out by important figures in tribe culture called medicine men. the prehistoric people believed that drilling a hole in the skull of a patient would release all of the 'bad spirits' which they believed caused all illnessess.

2 inch circular holes have been found in the skulls of Cro-Magnon people estimated to be 40,000 years old and also in the Incas from 2000 B.C.

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15y ago

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