"If you get all tangled up, just tango on!" It's what a retired officer who lost his sight (played by Al Pacino) says to a woman who fears making mistakes while dancing the tango in the 1993 film "Scent of a Woman." The woman overcomes her fear and dances beautifully, matching the movements led by the officer.
It has been shown to be true that anyone can dance a splendid tango if their hearts are in sync, even without sight or skill. The University of Colorado Boulder ATLAS research institute said on the 4th (local time), "When two people dance the tango, their brains synchronize so they can move as if they were one."
◇ Movements align within 0.2 seconds as brain waves match
Tango is a sensual dance in 2/4 time that originated in the hardships of lower-class people and immigrants in Buenos Aires, Argentina, in the late 19th century. With their chests touching, one person leads the dance and the partner improvises in response. Ruojia Sun, a researcher at the ATLAS institute, said she was captivated by the fact that, unlike other dances, tango has few set choreographies, which she has learned over the past five years.
Tango dancers improvise movements moment by moment and cue their partners to the next move through subtle signals, such as a gentle squeeze of the hand or an upper-body shift. Seeing movements align in such a short time, the team hypothesized that the two brains operate together. The researchers tracked footsteps with motion sensors on the ankles and measured brain activity with EEG caps on the head as five pairs of tango dancers performed.
When neurons in the brain fire, they generate brain waves, which are electrical signals in rhythmic patterns. The cap's EEG sensors measure these waves across various frequencies. Fast pulses known as beta waves appear when concentrating or thinking deeply, while slower theta waves appear during rest. 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, so were their brain waves. This trend appeared across various brain waves, including beta and theta. Scientists call this phenomenon "interbrain coupling" or "neural synchronization." It had been observed previously in instrument performance and other social activities, but this is the first confirmation in dance.
The study was led by Ellen Yi-Luen Do of the computer science department and Grace Leslie of the college of music. The team presented the findings at an international conference in Chicago in Mar. Researcher Thiago Roque, a doctoral candidate who led the experiment, said, "When we dance, our brains literally consolidate with each other," adding, "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, Viktor Müller's team at the Max Planck Institute for Human Development in Germany discovered that when two people play guitar together, their brain waves lock into the same frequencies. It was like two musicians in an orchestra keeping time to a metronome. The researchers called it within-frequency coupling (WFC).
Neural synchronization in guitar performance proved even more varied. In 2012, the Max Planck team confirmed that synchronization of brain waves occurred even when the two players were not playing exactly the same notes. If, as in tango, one person took the leader role to start or maintain tempo, their brain waves aligned with the partner keeping up.
Brain-wave alignment was not limited to duets. In 2024, the Max Planck team found the same phenomenon in a guitar quartet. It showed that, beyond simply keeping time, the brains were consolidated in a much more complex and organic way.
Notably, brain waves did not have to be at identical speeds for neural synchronization. The researchers also observed cross-frequency coupling (CFC), in which a slower brain wave in one member of the quartet modulated and exchanged information with a faster brain wave in another. Slower frequencies acted like a kind of pacemaker that bound and coordinated the overall network.
Neural synchronization can extend beyond dance or instrumental performance to other human activities. The Max Planck team said, "When people coordinate actions in other ways, such as playing sports or communicating with each other, their brain waves will also synchronize." This could be used to further advance social activities.
The Colorado team developed a biofeedback device that induces neural synchronization. The device vibrated strongly when brain waves aligned. While the moment of neural synchronization was identified, the vibration interfered with dancing. The team plans to reverse the operation so that it vibrates but goes silent when the brain waves align. This could be used for sports training. Roque at Colorado said, "In sports, you have to know what your teammate is going to do," adding, "In team sports like soccer or cycling, it can help people 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