An 18th century engraving of Galen by Georg P. Busch.
Galen was the son of Aelius Nicon, a Greek architect and builder.[4] Galen invented the 'Theory of Opposites' based on Hippocrates' Four Humours' theory, which helped develop medicine in the Roman age and again in the Middle Ages to include more natural-based medicine (rather than just religious medicine).[1][6][7]
Some of the observations he made in his books were wrong as he could only dissect animals (mostly pigs and apes) and compare them to humans due to the Roman ban on dissecting human corpses.[1][8]
Later in the Renaissance period, people such as Andreas Vesalius wrote books showing that some of what Galen said was wrong.[9] He was most famous for his discovery that proved that arteries carry blood and his dissection of a pig proved that the larynx nerves control the voice.[9] He also proved that the brain controls the body and not the heart.[9]
Galen was vital in the beginnings of natural medicine and is called the "Father of Anatomy".[10] He is also called the "Father of Medicine" second to Hippocrates.[11]
A 19th century lithograph of Galen by Pierre Roche Vigneron.
Galen dissecting a monkey as imagined by Veloso Salgado in 1906.
Aufderheide 2003, p. 5: "Tragically, the prohibition of human dissection by Rome in 150 BC arrested this progress and few of their findings survived. By the second century AD, Galen, the Greek physician who practiced principally in Rome, popularized the humoral theory of health and disease with the aid of only two human skeletons and animal dissections but without laboratory-based opportunities for human soft (nonskeletal) tissue dissection to guide him."
Hankinson, R. J. (2008). "The Man and his Work". In Hankinson, R. J. (ed.). The Cambridge Companion to Galen. Cambridge Companions to Philosophy. Cambridge: Cambridge University Press. pp.1–33. ISBN978-0-521-81954-1.
O'Malley, Charles Donald (1964). Andreas Vesalius of Brussels, 1514–1564. Berkeley, CA: University of California Press.
Pasipoularides, Ares (2014). "Galen, father of systematic medicine. An essay on the evolution of modern medicine and cardiology". International Journal of Cardiology. 172 (1): 47–58. doi:10.1016/j.ijcard.2013.12.166. PMID24461486.