Magnetic resonance imaging based muscle strain rate mapping during eccentric contraction to study effects of unloading induced by unilateral limb suspension

  • Usha Sinha | usinha@sdsu.edu Department of Physics, San Diego State University, San Diego, CA, United States.
  • Vadim Malis Department of Physics, University of California San Diego, San Diego, CA, United States.
  • Robert Csapo Private University for Health Sciences, Medical Informatics and Technology, ISAG, Research Unit for Orthopedic Sports Medicine and Injury Prevention, Hall, Austria.
  • Marco Narici Institute of Physiology, Department of Biomedical Sciences, University of Padua, Padua, Italy.
  • Shantanu Sinha Department of Radiology, University of California San Diego, San Diego, CA, United States.

Abstract

Age- and disuse- related loss of muscle force is disproportionately larger than the loss of muscle mass. Earlier studies reported that comparing concentric and eccentric contractions, there is a significant age-related decrease in force only in concentric contractions. Magnetic Resonance Imaging enables mapping of muscle deformation and has been used to study isometric but not eccentric contractions. We report MRI based strain rate mapping of the medial gastrocnemius in subjects pre- and post-unloading induced by Unilateral Limb Suspension. In contrast to isometric contraction, no difference in strain rate indices were observed post-unloading, in conformance with preserved force during eccentric contractions.

Dimensions

Altmetric

PlumX Metrics

Downloads

Download data is not yet available.
Published
2020-04-01
Info
Issue
Section
Focus on 30 Years of Translational Mobility Medicine - Communications
Keywords:
eccentric contraction, strain rate mapping, unilateral limb suspension, velocity-encoded phase contrast imaging
Statistics
  • Abstract views: 215

  • PDF: 98
  • HTML: 0
How to Cite
Sinha, U., Malis, V., Csapo, R., Narici, M., & Sinha, S. (2020). Magnetic resonance imaging based muscle strain rate mapping during eccentric contraction to study effects of unloading induced by unilateral limb suspension. European Journal of Translational Myology, 30(1), 139-143. https://doi.org/10.4081/ejtm.2019.8935