Differential behavior of distinct motoneuron pools that innervate the triceps surae

Author:

Cohen Joshua W.12ORCID,Vieira Taian M.3ORCID,Ivanova Tanya D.4,Garland S. Jayne45ORCID

Affiliation:

1. School of Kinesiology, Western University, London, Ontario, Canada

2. Collaborative Specialization in Musculoskeletal Health Research, Bone and Joint Institute, Western University, London, Ontario, Canada

3. Laboratorio di Ingegneria del Sistema Neuromuscolare (LISiN), Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, Turin, Italy

4. Physical Therapy, Faculty of Health Sciences, Western University, London, Ontario, Canada

5. Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada

Abstract

In this study, we demonstrate that the different subpopulations of motor units within the three muscles comprising the ankle plantarflexors behave differently during multidirectional leaning. Our results suggest that the central nervous system has the capability to control distinct subpopulations of motor units to meet the force requirements necessary for leaning. This may allow for a precise, efficient, and flexible control strategy for the maintenance of standing balance.

Funder

Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada

Publisher

American Physiological Society

Subject

Physiology,General Neuroscience

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