Jiangxi firefighters shivered with cold after rescue. Why do people tremble when they feel cold?

It is reported that the temperature in Nanchang City, Jiangxi Province was only 1 on June 5438+February/4? C, there is a strong wind blowing in the street, mixed with snowflakes falling. At a noodle restaurant at 4 am, firefighters who had just gone out to deal with the police situation sat together to eat noodles. Because of the cold, their hands holding chopsticks have been shaking, and they can't hold chopsticks stably. This scene was praised by the mainstream media in the country, and netizens paid tribute to the fire officials.

There is also a discussion about why people tremble when they feel cold.

In fact, trembling is a normal thermogenic reaction of human body and a function of human internal environment control system. When the body feels cold, it will inform the muscles of the body to contract, which can generate heat, thus resisting the cold outside. Behind our eyes, there is a tiny brain tissue called hypothalamus, which is responsible for controlling body temperature. When we are in a relatively cold environment, or when the body feels cold, in order to keep the body warm, the hypothalamus will send out the impulse to generate heat, which is also commonly known as the Cold War, and trembling is the last line of defense for the body to keep warm.

Because during the cold war, our body's pores will shrink, increasing involuntary muscle contraction, and our body will tremble involuntarily. This helps to keep the body's own heat and prevent heat from escaping from pores, so it will be hot and help to heat up.

Because the hypothalamus in the brain monitors the temperature of the skin, it determines when to start shaking. Chilling is one of many unconscious or subconscious functions of body self-regulation, which is similar to other self-stabilizing functions of human body, including respiratory rate, blood pressure, heart rhythm and weight regulation. Kazuro, a researcher at Oregon Medical University? According to Na Kamla, shivering can generate heat in skeletal muscle, which is usually the last way for human body to keep warm in cold environment.