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The functional capacity of the thermoregulatory system alters with aging, reducing the resistance of elderly people to extreme external temperatures. The shiver response may be greatly diminished or even absent in the elderly, resulting in a significant drop in mean deep body temperature upon
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Increased muscular activity results in the generation of heat as a byproduct. Most often, when the purpose of the muscle activity is to produce motion, the heat is wasted energy. In shivering, the heat is the main intended product and is utilized for warmth.
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is an area called the primary motor center for shivering. This area is normally inhibited by signals from the heat center in the anterior hypothalamic-preoptic area but is excited by cold signals from the
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Oka, T. (2015). Psychogenic fever: how psychological stress affects body temperature in the clinical population. Temperature: Multidisciplinary
Biomedical Journal, 2(3), 368–378.
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with violent shivering are called rigors. Rigors occur because the patient's body is shivering in a physiological attempt to increase body temperature to the new set point.
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exposure to cold. Standard tests of thermoregulatory function show a markedly different rate of decline of thermoregulatory processes in different individuals with ageing.
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Schoeller, F., Eskinazi, M., Garreau, D. (2018) Dynamics of the knowledge instinct: Effects of incoherence on the cognitive system. Cognitive
Systems Research 47: 85-91.
182:, as a person may feel cold. During fever, the hypothalamic set point for temperature is raised. The increased set point causes the body temperature to rise (
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and non-esterified fatty acids. These are then further degraded in the needed heat-generating process to form CO
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Goldstein A. (1980). Thrills in response to music and other stimuli. Physiol. Psychol. 8, 126–129.
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In humans, shivering can also be caused by cognition. This is known as
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Shivering can also appear after surgery. This is known as
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Bodily function in response to cold and extreme fear
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30:"Shiver" redirects here. For other uses, see
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