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The phi complex: a dual-EEG study of social coordination

The phi complex: a dual-EEG study of social coordination. Human Brain and Behavior Laboratory Center for Complex Systems & Brain Sciences. Florida Atlantic University. E. Tognoli, G.C. De Guzman, J. Lagarde, J.A.S. Kelso. A neurobehavioral view on social coordination.

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The phi complex: a dual-EEG study of social coordination

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  1. The phi complex: a dual-EEG study of social coordination Human Brain and Behavior Laboratory Center for Complex Systems & Brain Sciences Florida Atlantic University E. Tognoli, G.C. De Guzman, J. Lagarde, J.A.S. Kelso

  2. A neurobehavioral view on social coordination

  3. Our approach: Coordination Dynamics (Kelso, 1995) A theoretical framework for understanding informationally coupled self-organizing systems Social neurosciences: ways to measure how A’s behavior affects B’s brain and behavior Social behavior: emergent property of a group of people. Assessment of individuals one at a time Focus on the outcome of the interaction → no dynamics Temporal evolution is information-rich (mechanisms) Measure how social interaction continuouslyaffects the ongoing flow of behavior produced by each individual

  4. No vision Vision No vision How is coupling manipulated? Visual information exchange What real time behavior is studied? Spontaneously uncoordinated and coordinated rhythmic finger movements Dual-EEG recording Brain? identification of neuromarkers in the spectral domain

  5. 5 7 9 11 13 Frequency (Hz)

  6. Effect of social interaction, effect of social coordination Comparison of EEG spectra before and during vision: SOCIAL INTERACTION Comparison of EEG spectra in coordinated and uncoordinated trials: SOCIAL COORDINATION

  7. -20.1% -30.44%

  8. Phi2, coordinated trials: +9.6% Social behavior Phi1, uncoordinated trials: +12.1% Intrinsic behavior

  9. Intrinsic Behavior Coordination Behavior Dorsal visual pathway Dorsal visual pathway a↓ a↓ m↓ Somato- Sensory (reafference) m↓ Somato- Sensory (endogenous activity from observed action) Intrinsic motor preparation Mirror neuron activity f2↑ f1↑ M1 M1 Behaviors Behaviors

  10. Positive effect of social interactions Cognitive integrity (eg. Bassuk et al., 1999; Holtzman et al., 2004; Glei et al., 2005; Béland et al., 2005) Neuroprotection (Rose, 1985; Saczynski et al., 2006; Bennett et al., 2006) Health (Seeman, 1996; Seeman & Crimmins, 2001)

  11. Future directions • Loss of social coordination competencies in elderly ? • Increase allocation of resources to intrinsic motor function • Decrease informational coupling mediated by sensory loss • What about the mirror neuron system? m a f1 f2

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