In different cultures, human beings have a tendency to synchronize their actions with the fixed beat and periodic melody of music, which appeared when people were very young. In fact, this synchronous action response to the rhythm will be earlier than the appearance of the beat itself. Because we will know the rhythm pattern of music as soon as we hear it, we will build an internal model in our brain to predict where the next rhythm of music will appear. This internal model is very accurate and stable. Scientists Chen, Zatorre and Penhune in Montreal found that when a person beats with the rhythm of music, such as tapping a desktop with his fingers, their auditory cortex, motor cortex, basal nucleus and subcortical cerebellum are all activated. Even more amazing is that when a person is just listening to music or even imagining music, in addition to the auditory cortex, the motor cortex and subcortical motor system of the brain will also be activated, although they have no obvious action of beating time. In other words, our ability to grasp the rhythm of music, or the rhythm of time, depends on the interaction between the auditory cortex and the dorsal anterior motor cortex of the brain. This interactive mode based on brain network may be the source of our brain machine that swings with music.

Music should come from the emotional communication between people, and it comes from language. The speed of speech conveys different emotions and makes people emotional. This kind of emotional singing is not only reflected in the communication between people, but also in the communication between people and nature. The timbre of many musical instruments can be regarded as imitating the sound of nature. Ma Qin, for example, is like a horse braying. Guzheng imitates the sound of jade impact, and so on. As for people dancing, I think it is a conditioned reflex in primitive memory.