Aelius Galenus or
Claudius Galenus (; ; September 129 AD – /), better known as
Galen of Pergamon , was a prominent
Greek physician,
surgeon and
philosopher in the
Roman empire. Arguably the most accomplished of all
medical researchers of
antiquity, Galen influenced the development of various
scientific disciplines, including
anatomy,
physiology,
pathology,
pharmacology, and
neurology, as well as philosophy and
logic.