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Dynamics in interbrain synchronization while playing a piano duet.

Anja Lender1,2, Dionysios Perdikis1,3, Walter Gruber4

  • 1Max Planck Institute for Human Development, Center for Lifespan Psychology, Berlin, Germany.

Annals of the New York Academy of Sciences
|October 12, 2023
PubMed
Summary
This summary is machine-generated.

Interbrain synchronization, measured by interbrain phase coherence (IPC), increases during coordinated musical duets, especially when one musician disrupts the rhythm. This suggests brain coupling reflects cognitive control, not just sensory-motor responses.

Keywords:
EEG hyperscanninginterbrain couplingphase alignmentphase synchronizationpiano duossocial interaction

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Music Psychology

Background:

  • Human interaction relies on sensory and motor processes.
  • Interpersonal action coordination involves complex brain mechanisms.
  • The role of interbrain synchronization in coordinated actions requires further investigation.

Purpose of the Study:

  • To investigate the role of interbrain synchronization during interpersonal action coordination.
  • To determine if interbrain phase couplings are reducible to bottom-up processes or represent top-down cognitive control.
  • To examine brain activity during periods of high and low coordination demands in musical duets.

Main Methods:

  • Simultaneous electroencephalography (EEG) recording from 13 pairs of pianists performing a duet.
  • Behavioral analysis of musical synchronization and stability.
  • Analysis of interbrain phase coherence (IPC) in delta and theta frequency bands during perturbed and non-perturbed trials.

Main Results:

  • Behavioral desynchronization and instability were observed when one musician deliberately disrupted the play.
  • Interbrain synchrony (IPC) increased in delta and theta bands during perturbation compared to non-perturbed trials.
  • A shift from in-phase to anti-phase synchrony in the delta band accompanied the increased IPC.

Conclusions:

  • Interbrain synchronization is not merely a reflection of similar sensory or motor responses.
  • Interpersonal temporal alignment of brain mechanisms underlies interbrain synchronization.
  • Cognitive top-down control plays a significant role in coordinating actions, particularly under high demand.