Glossary P

Pyramidal motor system the system that originates in the cerebral cortex and controls voluntary movement.

Pyromania refers to an Impulse-Control Disorder involving the persistent, compelling and irresistible urge to start or to set fires. It is also defined as a pattern of deliberate setting of fires for pleasure or satisfaction derived from the relief of tension experienced before the fire-setting.

Pyrrho of Elis (ca. 360 - 270 B.C.) was the founder of Skepticism.

Pythagoras (ca. 580–500 B.C.) is the Greek scholar who suggested that the brain is at the center of human reasoning and plays a central role in the "soul's life." Pythagoras believed that an abstract world consisting of numbers and numerical relationships exerted an influence on the physical world. He created a dualistic view of humans by saying that in addition to our body, we have a mind (soul), which through reasoning could understand the abstract world of numbers. Furthermore, he believed the human soul to be immortal. Pythagoras' philosophy had a major influence on Plato and, through Christianity, on the entire Western world.

Related Articles