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The perplexing mystery of why so many trephined skulls from the Neolithic period have been uncovered all over the world representing attempts at primitive cranial surgery is discussed. More than 1500 trephined skulls have been uncovered throughout the world, from Europe and Scandinavia to North America, from Russia and China to South America (particularly in Peru). Most reported series show that from 5-10% of all skulls found from the Neolithic period have been trephined with single or multiple skull openings of various sizes. The unifying hypothesis proposed by the late medical historian Dr. Plinio Prioreschi (1930-2014) regarding the reason for these trepanations (trephinations) is analyzed. It is concluded that Dr. Prioreschi's cohesive explanation to explain the phenomenon is valid and that his intriguing hypothesis is almost certainly correct. In the opinion of this author, the mystery within an enigma has been solved.

Neolithic trepanation decoded- A unifying hypothesis: Has the mystery as to why primitive surgeons performed cranial surgery been solved?