Medicine & health
Galen of Pergamum is the first to take a person's pulse and use it in diagnosing problems. He shows that arteries contain blood, not air as had been believed. Galen describes the anatomy of the brain and its ventricles, demonstrating that different parts of the spinal cord control different muscles and that severing the spinal cord results in disabling voluntary motions of the part of the body below the cut. See also 260 bce Medicine & health.
