Lower complexity of motor primitives ensures robust control of high-speed human locomotion.

ABSTRACT: Walking and running are mechanically and energetically different locomotion modes. For selecting one or another, speed is a parameter of paramount importance. Yet, both are likely controlled by similar low-dimensional neuronal networks that reflect in patterned muscle activations called muscle synergies. Here, we challenged human locomotion by having our participants walk and run at a very broad spectrum of submaximal and maximal speeds. The synergistic activations of lower limb locomotor muscles were obtained through decomposition of electromyographic data via non-negative matrix factorization. We analyzed the duration and complexity (via fractal analysis) over time of motor primitives, the temporal components of muscle synergies. We found that the motor control of high-speed locomotion w

SUBMITTER: Santuz A 

PROVIDER: S-EPMC7610320 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature