Imagine: You are sitting alone on the couch, and a horror movie is playing on the TV. The murderer was walking towards an unsuspecting victim and then suddenly rushed to her.
At that moment, the hair on your body will erect and your spine will tremble. The same thing happened when you took a walk on a refreshing morning. When the music in your favorite song reaches its climax, you will feel trembling again, and this time, the little goose bumps on your arm will also take the opportunity.
The appearance of chills and goose bumps has its own good reasons: they are your body’s reaction to mood or stress. We inherited this reaction from the animal ancestors.
When they are chilled, the hair on them will erect (the movement of the pilose muscles will shrink the skin, lifting each hair) to provide additional insulation. This reaction also works when animals feel threatened: their instinctive reaction is to try to make themselves look bigger than the attacker, so they will bulge the skin and erect hair to achieve this effect. This reaction is controlled by the hypothalamus.
So the question is, in addition to the functional purposes of making ourselves look bigger or creating insulation, why do we have goose bumps in other situations? This is because our emotions are also related to the hypothalamus, so sometimes goose bumps are just our body’s reaction to the strong emotions of the brain.
When we feel emotions such as love, fear or sorrow, the hypothalamus sends a signal to our body to secrete adrenaline into our blood. This signal triggers the contraction of the pilose muscles, which causes us to have goose bumps caused by emotions. At the same time, the sudden onset of a large amount of adrenaline may cause us to sweat, tears, high blood pressure or chills.
The tremor that we listen to when listening to music is a mixed reaction to the awakening of music and physiology in subjective emotions. When we hear a song that makes us feel excited, or a song that makes us feel sad, then the hypothalamus will respond to sudden changes in mood, and we will feel the tremor of the spine physiologically.