Que se passe-t-il dans l'organisme lorsqu'on a peur? - C'est pas sorcier

The images of crime scenes, for example, reach the thalamus. The screening guard continues his work. The images are directed to the visual cortex. At the same time, these data are transmitted to the amygdala, which analyzes the situation. The result is without appeal. The situation is totally new, it is not reassuring. Therefore, you have to be afraid. The data are immediately transmitted to the hypothalamus, which presses on the accelerator pedal of the autonomic nervous system. At that moment, glands located above the kidneys send a big discharge of adrenaline into the blood. It's pure energy. As a result of this substance, the body reacts and prepares to flee the danger. The pupil expands to capture as much light as possible. The gaze is to the eyes. The lungs fill with air. Breathing accelerates. The heart beats faster and faster. Everything is in place to feed the muscles with oxygen, as if they were mobilized for a frantic race. We also palate, and this is normal, because it is the muscles of the legs that are irrigated first. Even digestion stops. The body's cooling system also anticipates. We start to sweat. These are the famous cold sweats. Meanwhile, the liver produces sugar, in other words, energy, to feed the muscles during the flight.