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Scale-free behavioral dynamics directly linked with scale-free cortical dynamics.

Sabrina A Jones¹, Jacob H Barfield¹, V Kindler Norman¹

¹Department of Physics, University of Arkansas at Fayetteville, Fayetteville, United States.

|January 27, 2023

Summary

Scale-free brain activity and behavior dynamics are linked in mouse visual cortex. Specific neural subsets compete, revealing new critical dynamics underlying complex brain and movement patterns.

Keywords:

behavior cerebral cortex mouse neuroscience physics of living systems scale-free

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Area of Science:

Neuroscience
Complex Systems
Computational Biology

Background:

Naturally occurring body movements and collective neural activity display complex, scale-free dynamics.
Scale-free dynamics in the brain and behavior are linked to functional benefits.
Previous research studied scale-free brain activity and behavior independently.

Purpose of the Study:

To investigate the relationship between scale-free dynamics in mouse behavior and neural activity in the visual cortex.
To explore the underlying mechanisms of scale-free neural dynamics and their connection to behavior.

Main Methods:

Analysis of spatiotemporal structure in mouse behavior and visual cortex neural activity.
Identification of specific neural subsets exhibiting scale-free dynamics.
Development of a computational model incorporating cell-type-specific circuit structure.

Main Results:

Strong correlation found between scale-free mouse behavior and visual cortex neural activity.
Scale-free neural activity was localized to specific neuronal subsets.
These subsets engaged in stochastic winner-take-all competition, challenging existing criticality theories.
A novel computational model explained findings through a new form of critical dynamics.

Conclusions:

Neural activity in the visual cortex provides the basis for scale-free behavior.
Scale-free neural activity possesses clear behavioral relevance.
The study introduces a new framework for understanding critical dynamics in neural systems.