Widefield cortical activity and functional connectivity during motorized locomotion

Abstract

The ability to move within a given environment necessitates constant regulation of sensory and motor functions. However, intricacies of sensory-motor integration via intercortical signal correlation remain to be fully elucidated. In this study, we dissociated internally driven cortical dominance from original signals by removing the influence of behavior variables during locomotion on motorized treadmill, wheel, and disk. There were no significant differences in either original or internally driven activity across the cortex of mice during walking based on the type of track. However, the spatial pattern of internally driven cortical connectivity depended on the track type. Especially, internally driven functional connectivity during sustained locomotion on the treadmill significantly decreased only in the medial M2 regions. Thus, the maintenance of stable locomotion on a linear runway is indicative of successful internal sensory-motor integration, which is achieved through inhibitory control of M2. Our findings demonstrate that the spatial patterns of cortical functional connectivity during locomotion are altered by the gait kinematics following physical rotation of the track. Furthermore, we suggest that understanding of health and disorder related to locomotion in environmental contexts requires the consideration of internally driven activity and functional connectivity across the widefield cortex.