Wang M, Sun J, Yang Q. Modeling and simulation of excitation- contraction coupling of fast-twitch skeletal muscle fibers.
Technol Health Care 2020;
28:13-24. [PMID:
32364140 PMCID:
PMC7369047 DOI:
10.3233/thc-209003]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND:
The current excitation-contraction coupling model of fast-twitch skeletal muscle fibers cannot completely simulate the excitation-contraction process.
OBJECTIVE:
To solve this problem, this study proposes an excitation-contraction model of fast-twitch skeletal muscle fibers based on the physiological structure and contractile properties of half-sarcomeres.
METHODS:
The model includes the action potential model of fast-twitch fiber membranes and transverse tubule membranes, the cycle model of 𝐶𝑎2+ in myofibril, the cross-bridge cycle model, and the fatigue model of metabolism.
RESULTS:
Finally, detailed analyses of the results from the simulation are conducted using the Simulink toolbox in MATLAB. Two conditions, non-coincidence and coincidence, are analyzed for both the thick and thin myofilaments.
CONCLUSIONS:
The simulation results of two groups of models are the same as the previous research results, which validates the accuracy of models.
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