A cold plunge may get your three brains in sync

“Three brains! What are you talking about?”

According to physician and scientist, Paul D. Maclean, our skulls house not one brain, but three. Each brain represents a distinct evolutionary stratum that formed upon the older layer, as if there were an archaeological site inside your skull. The human brain, Maclean believed, is three brains in one: the reptilian complex, the limbic system, and the n…