Galen's Extensive Description
Galen's extensive description is the earliest that survives. He spto recognize the cerebellum by its distinctive appearance. Aristotle and Herophilus (quoted in Galen) called it the parencephalis, as opposed to the encephalon or brain proper. Galen's extensive description is the earliest that survives. He speculated that the cerebellum was the source of motor nerves.[70]eculated that the cerebellum was the source of motor