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Concept
Humorism
Summary
Humorism, the humoral theory, or humoralism, was a system of medicine detailing a supposed makeup and workings of the human body, adopted by Ancient Greek and Roman physicians and philosophers.
Humorism began to fall out of favor in the 17th century and it was definitively disproved in the 1850s with the advent of germ theory, which was able to show that many diseases previously thought to be humoral were in fact caused by microbes.
Ancient Greek medicine
The concept of "humors" (chemical systems regulating human behaviour) became more prominent from the writing of medical theorist Alcmaeon of Croton (c. 540–500 BC). His list of humors was longer and included fundamental elements described by Empedocles, such as water, earth, fire, air, etc. The concept of "humors" may have origins in Ancient Egyptian medicine, or Mesopotamia, though it was not systemized until ancient Greek thinkers. The word humor is a translation of Greek χυμός, chymos (literally juice or sap, metaphorically flavor). Early texts on Indian Ayurveda medicine presented a theory of three humors (doṣas), which they sometimes linked with the five elements (pañca-bhūta): earth, water, fire, air, and space.
Hippocrates is usually credited with applying this idea to medicine. In contrast to Alcmaeon, Hippocrates suggested that humors are the vital bodily fluids: blood, phlegm, yellow bile, and black bile. Alcmaeon and Hippocrates posited that an extreme excess or deficiency of any of the humors (bodily fluid) in a person can be a sign of illness. Hippocrates, and then Galen, suggested that a moderate imbalance in the mixture of these fluids produces behavioral patterns. One of the treatises attributed to Hippocrates, On the Nature of Man, describes the theory as follows:
The Human body contains blood, phlegm, yellow bile, and black bile. These are the things that make up its constitution and cause its pains and health. Health is primarily that state in which these constituent substances are in the correct proportion to each other, both in strength and quantity, and are well mixed.
Official source
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