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The situated HKB model: how sensorimotor spatial coupling can alter oscillatory brain dynamics.

Miguel Aguilera1, Manuel G Bedia, Bruno A Santos

  • 1Department of Computer Science and Engineering Systems, University of Zaragoza Zaragoza, Spain.

Frontiers in Computational Neuroscience
|August 30, 2013
PubMed
Summary

Coordination dynamics in a closed sensorimotor loop create unique neural oscillation patterns not seen in isolated systems. This situated Haken-Kelso-Bunz (HKB) model reveals distinct neurodynamic signatures tied to behavior.

Keywords:
HKB modelcoordination dynamicsdynamical analysisembodied cognitionneurodynamicssensorimotor couplingsituated hkb model

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Area of Science:

  • Cognitive Science
  • Robotics
  • Neuroscience

Background:

  • Dynamic and embodied/situated approaches are increasing in cognitive science.
  • Little research exists on neural oscillations in closed sensorimotor loops compared to isolated systems.
  • The Haken-Kelso-Bunz (HKB) model is a well-understood generic model for dynamic coordination.

Purpose of the Study:

  • To investigate how coordination dynamics in a closed sensorimotor loop influence neural oscillations.
  • To compare a situated HKB model with decoupled HKB models.
  • To introduce and demonstrate the concept of a neurodynamic signature.

Main Methods:

  • Developed a situated Haken-Kelso-Bunz (HKB) robotic model for a gradient climbing task.
  • Solved differential equations for agent-environment coupling with varying sensor gain.
  • Compared the situated model against decoupled and passively-coupled HKB models.

Main Results:

  • The situated HKB model exhibited qualitatively different behavioral strategies and neural oscillation patterns compared to decoupled models.
  • System properties under coupled conditions changed radically, not deducible from isolated models alone.
  • Only the situated agent displayed a unique 'neurodynamic signature' correlating with specific behaviors.

Conclusions:

  • Closed sensorimotor loops fundamentally alter coordination dynamics and neural oscillations.
  • Decoupled models fail to capture the emergent properties of situated systems.
  • The neurodynamic signature concept offers a new way to link neural dynamics to behavior in embodied agents.