| Alcmaeon of Crotona |
a physician, student of Pythagoras, c. 500 B.C. He described bodily states as an interplay of opposites: health is an isonomy of hot and cold, wet and dry, etc.; disease, a monarchy of one of these qualities; thus he was one of the precursors of humoralism. Alcmaeon considered the brain to be the seat of sensation and thought, performed the first known human dissections, distinguished veins from arteries, discovered “passages” from the eye to the brain, and was the first observer of the development of a chick embryo. See also Empedocles.
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