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Fear, horror, amazed, or cold can make your body shiver and experience goosebumps. Body reactions are usually characterized by contraction of the small muscles around the pores, thus making the fine hairs on the skin taut.

According to Fit Sugar, this is caused by a reflex called piloerection. Reflexes that trigger small muscles around the pores of the skin to contract. Makes the fine hairs that grew up and appeared as small bumps all over the skin.

What is the cause? Physiological reactions that occur due to the release of adrenal hormones that trigger an increase in blood flow to the muscles around the pores. This condition occurs spontaneously and uncontrollably, just like when your face is red with embarrassment, body sweating in a panic, or pale when frightened.

Goosebumps are associated with primitive reactions that arise from the brain limbic system. Usually subside on their own over the body’s ability to adapt to the environment or after the body feel safe again.

When cold air hits, body shivers as a spontaneous reaction to warm the body. Some animals also have a similar reflex when feeling cold. Usually marked by the movement of fur all over their body.

Goosebumps is also a physiological response to fear, just as the emergence of sweating or increased heart rate. While in animals, spontaneous reaction when sensing danger threatens appeared an attempt to self-protection.

Goosebumps could be said to be the same with other emotions. Dealing with body reflexes associated with brain paleomammalian, the overall structure of the brain that regulate a variety of functions including emotion, attitude, motivation, long-term memory. That is why we can also experience goosebumps when hearing a beautiful song or touching story.