Why Humans Experience Fear
The answer to the question of Why Humans Experience Fear is complex. It is not determined by the sensory properties of the eliciting stimulus or by the physical action generated by the animal. Instead, fear is defined as a situated function. It is a mental state that involves a goal, set of actions, and sensory consequences, all of which are inferred from priors and the environment. In many cases, the exact mechanisms of fear are unknown.
The “fight or flight” response involves the activation of the brain’s central nervous system. This activates the body’s physiological systems, which then produce physical responses. A fast heartbeat, rapid breathing, and an increase in blood pressure all result in a person feeling frightened. The skin also sweats, helping the body stay cool. In addition, some people notice sensations in their chest, arms, and legs. The physical symptoms of fear may be mild or severe.
Researchers have determined that the brain sends signals to the nervous system, which leads to physical reactions. These include increased heart rate and blood pressure, and the muscles contract to perform physical action. In addition, the skin sweats, which helps to keep the body cool. Some people may experience physical sensations in their hands, legs, and stomach. These symptoms are common to most human phobias, though they can be irrational and even dangerous.