Published on 2022/03/18
WHAT HAPPENS WHEN WE ARE SCARED?
Fear takes place in the reptilian brain, which is the part of our brain that regulates basic survival actions like eating or breathing, as well as the limbic system. There is also the amygdala. Whenever the amygdala detects a source of danger, it activates the hypothalamus and pituitary, which secrete adrenocorticotropic hormone, and the adrenal gland, which releases epinephrine. When both substances come together, cortisol is generated, a hormone that, among other things, increases blood pressure and blood sugar. Why? To get a shot of energy that allows us to react in face of threats.
When we are faced with a threat or danger we have two options: fight or flee. The goal of fear is to prepare the human body so that, whatever we choose, we get out of it unscathed.
When all this happens, heart and lung function accelerates to bring more oxygen to the muscles, stomach and intestine function is inhibited, slowing or even stopping digestion, and pupils dilate to focus on the threat.
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