When the center of interest in Greek medicine was transferred from Greece itself to Egypt, and the Alexandrian school represented what was best in medical thinking and investigation, we find evidence once more of wise physicians realizing the influence of the mind on the body and of what seemed to physicians of lesser experience the cure of physical ills by mental means. One of the most distinguished physicians of all time is Erasistratos, who, with Herophilus, made the fame of the great medical school at Alexandria, {12} the first university medical school in the world's history. Both practiced dissection with assiduity, and, while it is Herophilus' name that is associated with the torcular within the skull, and it was he who gave the name calamus scriptorius to certain appearances in the fourth ventricle, and otherwise stamped his personality on the study of the brain, it is to Erasistratos that we have to turn for a typical example of the mental physician. Erasistratos, about 300 B. C, recognized the valves of the heart, gave them the names tricuspid and sigmoid, and, like his great colleague, studied particularly the nervous system. He seems to have distinguished the nerves of motion from those of sensation, recognized their different functions and the different directions in which they carried impulses, and thought the brain the most important organ in the body.

The story is told that he was summoned in consultation to see the son of Seleukos, surnamed Nikator, the Macedonian general of Alexander the Great, who became ruler of Babylonia. The illness of this son, Antiochos, had baffled the skill of the court physicians. While Erasistratos was feeling his patient's pulse, the stepmother of the young prince entered the room. She, the second wife of his father, was young and handsome, and Erasistratos noted that there was great perturbation of the pulse as soon as the stepmother came in. He correctly surmised that the young man was in love with the lady and that his illness had been occasioned by the feeling that his love was hopeless. The very sharing of his secret seems to have started the young man's cure, and Erasistratos' wisdom and medical skill became a proverb throughout the East.