Do the animals dance to the rhythm of the music? Until now, it was believed to be an innate and unique ability in humans to move precisely while playing a song. But a new investigation in Japan has shattered that idea. Rats also have this ability. They move to the rhythm of the music. They are dancing. And they do it like humans: optimum tempo depends on the time constant in the brain (the rate at which the brain reacts to something), which is similar in all species.
The result is surprising: The ability of the auditory and motor systems to interact with music and move in time may be more common across genres than previously thought.. This new discovery not only provides a better understanding of the animal mind, but also presents the origins of human music and dance.
this rhythm perception and synchronization A tempo between 120 and 140 ‘beats’ (beats, pulses or beats) per minute (BMP) is common in humans and is often used in musical compositions. A group of researchers from the University of Tokyo studied physical movements and neural activity in humans and rats to determine their sensitivity to heartbeat.
Close examination of head movements and neural recordings revealed that: rats show remarkable beat synchrony and activities between 120 and 140 BMPs in the auditory cortex. They adapt their movements to the tempo of the music. Just like people.
Complex neural and motor processes
“Our results support the hypothesis that the optimal tempo for beat synchronization is determined by the time constant of neuronal dynamics that is conserved across species, rather than the species-specific time constant of movements. It’s physical,” say the researchers, who encouraged further work for the study. origins of music and dance.
The results of the study, although already proven, represent an absolute novelty. many animals also respond to hearing noise and can be trained to make rhythmic sounds or to respond to music.. But it’s not all the same complex neural and motor processes that work together to naturally recognize, respond to, and even predict the rhythm of a song. This is known as ‘beat’ synchronization.
People can predict the next ‘hits’. Although more studies are needed to confirm rats they can too, it’s already been shown they can sync with the music and seem to “show some level of predictive processing”.
The main work focused on responses to a Mozart work (“Two Piano Sonata in D Major”, K. 448), but four other pieces were also used: Lady Gaga’s “Born This Way”, “Another One Bites the Dust” “Queen” , “Beat It” by Michael Jackson and “Sugar” by “Maroon 5”.
“The rats showed innate beat synchronization, that is, without any prior training or exposure to music, and most clearly between 120 and 140 BPM, humans also show the clearest synchronization,” explains Hirokazu Takahashi, Associate Professor at the Information Institute. Science and technology.
profound effects on emotion
“Music exerts a powerful pull on the brain and has profound effects on emotion and cognition.“, says Takahashi, who is also an expert in electrophysiology — the science that deals with electrical activity in the brain — and has studied the auditory cortex of mice for many years.
The team had two alternative hypotheses. First, the optimal musical tempo for synchronization will be determined by the body’s time constant, which differs between species and is much faster for small animals. Second, the optimal rhythm will be determined by the brain’s time constant, which is surprisingly similar across species.
After conducting the research with 20 human participants and 10 mice, our results show that: The optimal tempo for synchronization depends on the time constant in the brain.“Takahashi points.
The team discovered this both rats and humans nod to the musicand it was seen that the level of nodding decreased as the music was accelerated.
The authors now want to uncover how other musical features such as melody and harmony are related to the dynamics of the brain. “I’m also interested in how, why, and what mechanisms create human cultural domains in the brain, such as fine arts, music, science, technology, and religion,” Takahashi adds.
I think this question is the key point understand how the brain works and develop artificial intelligence (artificial intelligence) next generation. Also, as an engineer, I am interested in using music for a happy life,” the researcher concludes.
Reference work: https://www.science.org/doi/10.1126/sciadv.abo7019
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