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[Heat and Fever in ancient Greek physiology]
1Department of the History of Medicine and Medical Ethics, Seoul National University College of Medicine, Korea.
Ui Sahak
|January 26, 2010
Summary
This study clarifies the distinction between physiological heat and pathological heat (fever) in ancient Greek medicine. It uses Georges Canguilhem
Area of Science:
- History of Medicine
- Philosophy of Science
Context:
- Ancient Greek medical theories on innate and pathological heat.
- The philosophical framework of Georges Canguilhem's 'The Normal and the Pathologic'.
- Historical perspectives from Galen and Peripatetic authors on heat in physiology and pathology.
Purpose:
- To analyze the relationship between physiological heat and pathological heat (fever).
- To apply Canguilhem's theoretical scheme to ancient Greek medical concepts.
- To differentiate between heat 'kata phusin' (according to nature) and 'para phusin' (against nature).
Summary:
- Explores ancient Greek views on physiological and pathological heat, including Galen's distinction.
- Applies Canguilhem's philosophy to understand the continuity or discontinuity between normal and abnormal heat.
- Highlights how Peripatetic authors and Claude Bernard viewed pathology in relation to physiology.
Impact:
- Provides a novel interpretation of ancient medical concepts through a modern philosophical lens.
- Enhances understanding of the historical development of concepts related to fever and homeostasis.
- Demonstrates the utility of Canguilhem's framework for analyzing historical scientific ideas.
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Increased Body Temperature
A body temperature above 38°C (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in response to an infection or illness.
Homeostatic Imbalances in Body Temperature
Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
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Fever can be triggered by several factors, including infections, nervous system disorders, certain cancers, blood diseases like leukemia, embolism, thrombosis, heatstroke, dehydration, surgical trauma, crushing injuries, and allergic reactions.
Here are the different types of fever:
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The signs and symptoms of fever include hot and dry skin, flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Elevated body temperature is reduced using two methods: pharmacological and nonpharmacological. Proper identification and treatment of the root cause of a fever is of utmost importance.
Pharmacological Methods of Reducing Fever:
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Body Temperature
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
Body Temperature
Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C (97–99°F), remaining relatively stable...
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C (97–99°F), remaining relatively stable...

