Shivering Cold

Shivering is an involuntary rhythmic contraction of human skeletal muscles that occurs when the body cools down. It is one of the mechanisms of thermoregulation and contributes to a rapid increase in heat production in the body.

The mechanism of shivering is that when body temperature decreases, muscle fibers contract in the muscles, which leads to an increase in heat production and an increase in body temperature. This allows you to maintain optimal body temperature and avoid hypothermia or overheating.

Trembling can occur in both humans and animals. It usually manifests itself as small movements in the extremities, such as trembling fingers or trembling of the whole body. Trembling can be either physiological or pathological.

Physiological tremors occur when there is strong emotional arousal, such as fear or anger. It can also occur during physical activity, when the muscles are actively working and require more oxygen and nutrients.

Pathological tremors can be associated with various diseases, such as Parkinson's disease, epilepsy, alcohol addiction and others. In this case, the shaking may become uncontrollable and lead to serious health consequences.

Overall, shivering is an important mechanism for the body's thermoregulation and helps maintain optimal body temperature. However, if the shaking becomes uncontrollable or is accompanied by other symptoms, you should see a doctor for diagnosis and treatment.

Cold shivering (or stool-like shivering) is an involuntary rhythmic contraction of human skeletal muscles when the ambient temperature drops or under conditions of physical exertion to increase heat transfer. Cold shivering occurs at air temperatures below +20°C. At the same temperature in laboratory conditions, trembling of the fingers and toes, convulsive contraction of the muscles of the neck and head, goose bumps in the skin of the hands, dilated skin vessels, increased pulse rate, and increased muscle tone are observed at rest.