Influence of muscle packing on the three-dimensional architecture of rabbit M. plantaris.

Autor: Borsdorf M; Department of Motion and Exercise Science, University of Stuttgart, Stuttgart, Germany. Electronic address: mischa.borsdorf@inspo.uni-stuttgart.de., Papenkort S; Department of Motion and Exercise Science, University of Stuttgart, Stuttgart, Germany., Böl M; Institute of Mechanics and Adaptronics, Technische Universität Braunschweig, Braunschweig, Germany., Siebert T; Department of Motion and Exercise Science, University of Stuttgart, Stuttgart, Germany; Stuttgart Center for Simulation Science, University of Stuttgart, Stuttgart, Germany.
Jazyk: angličtina
Zdroj: Journal of the mechanical behavior of biomedical materials [J Mech Behav Biomed Mater] 2024 Dec; Vol. 160, pp. 106762. Date of Electronic Publication: 2024 Sep 29.
DOI: 10.1016/j.jmbbm.2024.106762
Abstrakt: In their physiological condition, muscles are surrounded by connective tissue, other muscles and bone. These tissues exert transverse forces that change the three-dimensional shape of the muscle compared to its isolated condition, in which all surrounding tissues are removed. A change in shape affects the architecture of a muscle and therefore its mechanical properties. The rabbit M. plantaris is a multi-pennate calf muscle consisting of two compartments. A smaller, bi-pennate inner muscle compartment is embedded in a larger, uni-pennate outer compartment (Böl et al., 2015). As part of the calf, the plantaris is tightly packed between other muscles. It is unclear how packing affects the shape and architecture of the plantaris. Therefore, we examined the isolated and packed plantaris of the contralateral legs of three rabbits to determine the influence of the surrounding muscles on its shape and architectural properties using photogrammetric reconstruction and manual digitization, respectively. In the packed condition, the plantaris showed a 27% increase in fascicle pennation and a 54% increase in fascicle curvature compared to the isolated condition. Fascicle length was not affected by muscle packing. The change in muscle architecture occurred mainly in the outer compartment of the plantaris. Furthermore, the isolated plantaris showed a more circular shape and a reduced width of its muscle belly. It can be concluded that the packed plantaris is flattened by the forces exerted by the surrounding muscles, causing a complex architectural change. The data provided improve our understanding of muscle packages in general and can be used to develop and validate realistic three-dimensional muscle models.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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