Viscoelastic properties of the human sternocleidomastoideus muscle of aged women in relaxation
GRAS ; MITTON ; VIOT ; LAPORTE
Type de document
ARTICLE A COMITE DE LECTURE REPERTORIE DANS BDI (ACL)
Langue
anglais
Auteur
GRAS ; MITTON ; VIOT ; LAPORTE
Résumé / Abstract
Improving the numerical models of the head and neck complex requires understanding the mechanical properties of the muscles; however, most of the data in existing literature have been obtained from studies on animal muscles. Muscle is hyper-elastic, but also viscoelastic. The hyper-elastic behaviour of the human sternocleidomastoideus muscle has been previously studied. The aim of this study is to propose a characterization of the viscoelastic properties of the same human muscle in relaxation. Ten muscles were tested in vitro. The viscoelastic behaviour was modelled with a generalized Maxwell's model studied at the first and second order, using an inverse approach with a subject-specific, finite-element model of each muscle. Based on these models, relaxation times Ä (first order: 103 s; second order: 18 s and 395 s) and ratio moduli ³ (first order: 0.33; second order: 0.20 and 0.19) were identified. The first-order model provided a good estimate of the relaxation curve (R2: 0.82), but the second-order model was more representative of the experimental response (R2: 0.97). Our results provide evidence that the viscoelastic behaviour of the human sternocleidomastoideus muscle can be described using a second-order Maxwell's model and that - combined with the previously identified hyper-elastic properties - the response of the muscle in tension and relaxation is fully characterized.
Source
Journal of the Mechanical Behavior of Biomedical Materials, pp. 77-83 p.
Editeur
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