MattMooradian
Well-Known Member
Here's a biological explanation of fear: Fear is a genetically programmed response to perceived threat. Within 1/2 of a second of perceived threat, the human (and animal) biology goes through enormous changes. Adrenaline is released, which elevates the heart rate. Blood rushes from the gastrointestinal system (stomach, intestines, throat, etc.) and into the major muscle groups (to enhance muscle strength). Breathing changes to either rapid short breaths (similar to an Olympic weight lifter's breath during 'clean & jerk), to enable bursts of energy. Or, breathing may become very shallow (these are the people who faint during fear), to allow for 'playing-dead' to avoid threats. Also, during fear, the pancreas secretes more insulin to break down fats into sugar, so as to increase available energy. During the fear response, the immune system gets turned on full force, but immune system resources can be depleted, so stressful fear often leads to a depleted immune system. Blood platelets are produced at a more rapid pace during the fear response, as well, in the event that the threat causes harm, the body will clot faster to prevent death.
Fear has many other aspects, as well. The triggers for fear, the tendency for fear to transform into anger, the behavioral impulse to fight or flee (or play dead).
Fear has many other aspects, as well. The triggers for fear, the tendency for fear to transform into anger, the behavioral impulse to fight or flee (or play dead).