Calor

Calor is a Latin term meaning "heat." It is one of the four classical signs of inflammation, the others being rubor (redness), tumor (swelling), and dolor (pain). The term is used in various scientific and medical contexts to describe the sensation or presence of heat.

Historical Context

The concept of calor as a sign of inflammation dates back to ancient medical practices. The Roman physician Aulus Cornelius Celsus first described the four cardinal signs of inflammation in the 1st century AD. These signs have been foundational in the study of pathology and medicine.

Physiological Basis

Calor occurs due to increased blood flow to the affected area, a process known as hyperemia. This is part of the body's immune response to injury or infection. The increased blood flow brings more white blood cells and other immune components to the site of inflammation, which helps to combat pathogens and initiate the healing process.

Clinical Significance

In modern medicine, the presence of calor is an important diagnostic indicator. It helps healthcare professionals identify areas of inflammation and assess the severity of an infection or injury. Calor is often accompanied by other symptoms such as fever, which is a systemic response to infection.

Related Concepts

• Rubor: Redness caused by increased blood flow.
• Tumor: Swelling due to fluid accumulation.
• Dolor: Pain resulting from the release of chemicals that stimulate nerve endings.
• Functio laesa: Loss of function, sometimes considered the fifth sign of inflammation.

See Also

• Inflammation
• Immune response
• Pathology
• Fever
• Hyperemia

Resources

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Source: Data courtesy of the U.S. National Library of Medicine. Since the data might have changed, please query MeSH on Calor for any updates.

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