Why Humans Experience Fear

When you look at the brain’s structure, you’ll notice that humans have a very complex system for determining the importance and valence of a given stimulus. The process of fear is a natural and physiological reaction that is highly individual. It alerts us to danger, and it can occur from real or imagined threats. It is a symptom of various mental health problems, including anxiety disorders, post-traumatic stress disorder, and panic attacks. In this article, we’ll discuss some of the basic components of fear, and discuss why we feel it.

Why Humans Experience Fear

The brain sends signals to various parts of the body to trigger a fear response. The physical response to fear includes an increase in heart rate, increased blood pressure, and increased respiratory rate. Other physical symptoms of a fear response include tingling sensations in the legs, arms, and stomach. The brain generates memory-based expectations of a person’s physical reaction, and these responses are the result of the physiological responses to a threatening situation.

When we’re afraid, our brain sends signals to our body’s nervous system. These reactions trigger physical reactions, including increased blood pressure, faster heartbeat, and rapid breathing. Blood pumps to different muscles for physical action. In some cases, sweating occurs, helping the body to stay cool. Some people also experience physical sensations in their chest, abdomen, legs, and hands. While these sensations are relatively mild, the physiological effects of fear can be dangerous.