On the anisotropy of skeletal muscle tissue under compression

[Display omitted] This paper deals with the role of the muscle fibres and extracellular matrix (ECM) components when muscle tissue is subjected to compressive loads. To this end, dissected tissue samples were tested in compression modes which induced states of fibres in compression (I), in tension (...

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Bibliographic Details
Published in:Acta biomaterialia 2014-07, Vol.10 (7), p.3225-3234
Main Authors: Böl, Markus, Ehret, Alexander E., Leichsenring, Kay, Weichert, Christine, Kruse, Roland
Format: Article
Language:English
Subjects:
Animals
Biochemical Phenomena
Biomechanical Phenomena
Constitutive models
Extracellular Matrix
Female
Muscle, Skeletal - physiology
Porcine biceps femoris muscle
Pure shear
Skeletal muscle
Swine
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Summary:[Display omitted] This paper deals with the role of the muscle fibres and extracellular matrix (ECM) components when muscle tissue is subjected to compressive loads. To this end, dissected tissue samples were tested in compression modes which induced states of fibres in compression (I), in tension (II) or at constant length (III), respectively. A comparison of the stress responses indicated that the tissue behaviour is significantly different for these modes, including differences between the modes (I) and (III). This contradicts the paradigm of many constitutive models that the stress response can be decomposed into an isotropic part relating to the ECM and an anisotropic fibre part the contribution of which can be neglected under compression. Conversely, the results provide experimental evidence that there is an anisotropic contribution of the fibre direction to the compressive stress. Interpreting these results in terms of recent microscopical studies, potential connections between the observed behaviour and the structure of muscle ECM are established.
ISSN:1742-7061
1878-7568
DOI:10.1016/j.actbio.2014.03.003