"If you make a misstep, that's tango!" That's what a retired officer (Al Pacino) who lost his sight says to a woman who is afraid to dance tango for fear of making a mistake in the 1993 film Scent of a Woman. The woman overcomes her fear and dances beautifully, following the movements led by the officer.
It has been shown to be true that anyone can dance a fine tango as long as they are in sync at heart, even without sight or skill. The ATLAS research institute at the University of Colorado Boulder said on the 4th (local time), "When two people dance tango, their brains synchronize so they can move as if they were one body."
◇Brain waves align and movements match within 0.2 seconds
Tango is a sensual dance in 2/4 time that originated in the sorrows of the lower classes and immigrants of Buenos Aires, Argentina, in the late 19th century. With their chests pressed together, one person leads the dance and the partner improvises to match. Ruojia Sun of ATLAS said tango, which Sun has been learning for five years, was captivating because, unlike other dances, there is little fixed choreography.
Tango dancers create movements on the spot and signal the next step to their partners through subtle cues, such as lightly gripping the hand or moving the upper body. Seeing the movements align in that short time, the team hypothesized that the two brains were working together. The researchers tracked steps with motion sensors attached to the ankles and examined brain activity with EEG caps on the head as five pairs of tango dancers performed.
When neurons in the brain fire, brain waves—electrical signals in the form of waves—are generated. The EEG sensors in the cap measure these waves at various frequencies. When concentrating or thinking deeply, fast pulses known as beta waves appear, and when at rest, slower theta waves are generated. The researchers found that when men and women moved together in time, their brain activity became strikingly similar.
For example, when the leader steps forward and the partner steps back within 0.2 seconds, the two people's brain waves tended to rise and fall almost simultaneously and align. When their steps were off, their brain waves were off as well. This tendency appeared across various brain waves, including beta and theta. Scientists call this phenomenon "interbrain coupling" or "neural synchronization." Although it had been observed previously in playing instruments and other social activities, this was the first confirmation in dance.
The study was led by Ellen Yi-Luen Do of the Department of Computer Science and Grace Leslie of the College of Music. The team presented the results at an international conference in Chicago in March. Doctoral researcher Thiago Roque, who led the experiments, said, "When we dance, our brains are actually consolidated," and explained, "We are synchronizing brains through behavior."
◇Brain synchronization also in guitar performance and sports
Neural synchronization was first found in a guitar duet. In 2009, a team led by Viktor Müller at the Max Planck Institute for Human Development in Germany discovered that when two people played guitar together, their brain waves locked together at the same frequencies. It was like two players in an orchestra matching time while playing to a metronome. The team called it within-frequency coupling (WFC).
Neural synchronization in guitar performance proved more diverse. In 2012, the Max Planck team confirmed that synchronization of brain waves occurred even when the two players did not play exactly the same notes. When, as in tango, one person took the lead to start the performance or maintain tempo, the brain waves aligned with the partner matching it.
Matching brain waves was not limited to duets. In 2024, the Max Planck team found the same phenomenon in a guitar quartet. It now showed that the brains were consolidated in a much more complex and organic way, beyond simply keeping time.
In particular, brain waves did not need to be at the exact same speed for neural synchronization. Cross-frequency coupling (CFC), in which a slow brain wave in one member of the quartet modulated and exchanged information with a fast brain wave in another, was also observed. Slow frequencies among brain waves act as a kind of pacemaker that binds and tunes the entire network as one.
Neural synchronization can apply not only to dance or playing instruments but also to other human activities. The Max Planck team said, "When people coordinate their actions in other ways, such as playing sports or communicating with each other, their brain waves will also synchronize." Using this could further advance social activities.
The University of Colorado team developed a biofeedback device that induces neural synchronization. The device vibrated strongly when brain waves aligned. They were able to identify the moments of neural synchronization, but the vibrations interfered with the dance movements. The team plans to reverse the mechanism so that it vibrates and then falls silent when brain waves align. This could be used in sports training. Roque at the University of Colorado said, "In sports, you have to know what your teammate will do," adding, "In team sports like soccer or cycling, it can help teammates learn and understand each other's actions."
References
Proceedings of the Twentieth International Conference on Tangible, Embedded, and Embodied Interaction (2026), DOI: https://doi.org/10.1145/3731459.3773332
Frontiers in Human Neuroscience (2024), DOI: https://doi.org/10.3389/fnhum.2024.1416667
Frontiers in Human Neuroscience (2012), DOI: https://doi.org/10.3389/fnhum.2012.00312
BMC Neuroscience (2009), DOI: https://doi.org/10.1186/1471-2202-10-22