Dynamics of Modular Neuromotor Control of Walking and Running during Single and Dual Task Conditions

The aim of the study was to determine stability and complexity muscle synergies provide insight neural control gait in walking running when performing a concurrent cognitive dual task. Eighteen healthy young adults performed at preferred speeds 120% single task conditions. Muscle were determined from activity 9 trunk leg muscles centre mass (COM) motion recorded with an inertial measurement unit. Local dynamic stability, width synergies, COM determined, addition cross sample entropy coupling between synergies. Increasing locomotion speed increased decreased decrease synergy but no change width. also increasing speed. Vertical more complex less stable anterior-posterior or medio-lateral directions locomotion. These findings indicate that changes neuromotor dynamics may underpin reported local during as commands responsible for generating movement are altered response demands. Increased demands lead possibly maintain directions.