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Galen's understanding of anatomy and medicine was principally influenced by the then-current theory of the four humors: black bile, yellow bile, blood, and phlegm, as first advanced by the author of On the Nature of Man in the Hippocratic corpus. [11] Galen's views dominated and influenced Western medical science for more than
Empedocles's theory suggested that there are four elements: earth, fire, water, and air, with the earth producing the natural systems. Since this theory was influential for centuries, later scholars paired qualities associated with each humor as described by Hippocrates/Galen with seasons and "basic elements" as described by Empedocles. [39]
Galen addresses that the proof for the liver is not as obvious as it was in the case of the heart and the brain. [13] Galen also made a focus on the view on nature. He agreed with ancient doctrine of the four elements which includes the earth, water, wind and the fire to embody the cold, hot dry and wet irreducible qualities. This made a ...
An opposing theory called "cephalocentrism", which proposed that the brain played the dominant role in controlling the body, was first introduced by Pythagoras in 550 BC, who argued that the soul resides in the brain and is immortal. [4] His statements were supported by Plato, Hippocrates, and Galen of Pergamon. Plato believed that the body is ...
Balloonist theory was a theory in early neuroscience that attempted to explain muscle movement by asserting that muscles contract by inflating with air or fluid. The Roman and Greek physician Galen believed that muscles contracted due to a fluid flowing into them, and for 1500 years afterward, it was believed that nerves were hollow and that they carried fluid. [1]
Greek physician Galen was the first to give written description about the pineal gland in the 2nd century CE. [8] He indicated that the structure as an part of the brain was already known to earlier Greek scholars, crediting Herophilus (325–280 BCE) as the first to have described the possible role of the gland. [9]
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[52] [53] Medical students continued to study Galen's writings until well into the 19th century. Galen conducted many nerve ligation experiments that supported the theory, which is still accepted today, that the brain controls all the motions of the muscles by means of the cranial and peripheral nervous systems. [54]