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Related Concept Videos

Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

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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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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...
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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...
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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.
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A Preclinical Model of Exertional Heat Stroke in Mice
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Exertional Heat Illness in Active Populations.

Caroline E Murphy1,2, David W DeGroot3, Francis G O'Connor4

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Exertional heat illness (EHI) is a serious risk for active people. Understanding its causes and physiological effects is key to preventing and managing this condition effectively.

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Area of Science:

  • Sports Medicine
  • Environmental Physiology
  • Exercise Science

Background:

  • Exertional heat illness (EHI) is a significant cause of illness and death in athletes and military personnel.
  • EHI occurs when the body cannot dissipate heat effectively due to metabolic heat, environmental conditions, and protective gear.
  • Thermoregulatory functions like cardiovascular adjustments and evaporative cooling are crucial for preventing heat strain.

Purpose of the Study:

  • To review the physiological mechanisms of EHI.
  • To examine the impact of heat stress on the exercising heart.
  • To summarize current best practices for EHI prevention, recognition, and management.

Main Methods:

  • Literature review of physiological responses to heat stress during exercise.
  • Analysis of factors contributing to EHI.
  • Synthesis of evidence-based guidelines for clinical practice.

Main Results:

  • EHI results from a failure in thermoregulation under strenuous conditions.
  • Heat stress significantly impacts cardiac function during exercise.
  • Effective prevention and management strategies are essential for active populations.

Conclusions:

  • EHI is a preventable condition with significant health implications.
  • A thorough understanding of EHI pathophysiology is vital for medical professionals.
  • Implementing evidence-based practices can reduce EHI incidence and severity.