Involuntary contraction or twitching of the muscles. It is a physiologic method of heat production in man and other mammals.
Trembling of the body from cold or fear or other emotional state.
The condition of trembling or shaking all over the body because of cold or a fever, caused by the involuntary rapid contraction and relaxation of the muscles.
Involuntary contraction of muscles in the skin in response to low temperatures or the start of a fever.
Unintentional quivering of the entire body arises from the swift contraction and relaxation of muscles. Shivering constitutes the body’s natural automatic reaction to cold temperatures, and it also manifests during episodes of fever.
As the body experiences cold, nerve cells sensitive to temperature in the hypothalamus (a region of the brain) function like a thermostat, triggering the shivering reflex. This prompts muscle contractions, generating warmth. Shivering induced by cold typically ceases once the body is heated and approaches a nearly normal temperature.
Shivering experienced during fever occurs due to the discharge of specific substances by white blood cells. Typically, an infection acts as the stimulus for this release. These substances essentially “reset” the thermostat to a higher level, causing the body to shiver when it requires heat loss instead of heat retention.
An involuntary shaking or trembling of the body caused by muscle contractions, serving as a physiological indicator of heat generation in humans and other mammals.