科学美国人60秒:Brain Rhythms Sync to Musical Beat

While listening to music, you might find yourself tapping your foot or bobbing your head to the beat. What you might not have expected is that as you listen to your favorite tune, the rhythms in your brain also follow along.

Brain rhythms arise when large groups of neurons fire together. Previous studies have shown that listening to someone talk can elicit such activity. Now research reveals that brain rhythms also synchronize with musical sequences. And musical training can enhance this ability. The study is in the Proceedings of the National Academy of Sciences [Keith B. Doelling and David Poeppel, Cortical entrainment to music and its modulation by expertise].

Magnetoencelphalography, or MEG, is a technique that measures the tiny magnetic fields generated by brain activity. Researchers used MEG to compare the brains of musicians and non-musicians while the subjects tried to detect small changes in pitch during short clips of classical piano music by composers like Bach, Beethoven and Brahms. The trained musicians, not surprisingly, tracked the pitch changes better.

When it came to tempo, musicans and non-musicians alike synched their brains to the music—when the music had more than one note per second. But when faced with slower tempos, only the brains of musicians synched up.  

Because speech and music share similar brain networks, it’s possible that musical training thus could also improve linguistic abilities. So pick up your instrument of choice and play away—you might not feel it, but your brainwaves will dance along to your favorite song.

—Diana Kwon

(The above text is a transcript of this podcast)