A comparison of static and dynamic characteristics between rectus eye muscle and linear muscle model predictions

• Published in: IEEE transactions on biomedical engineering 1991-12, Vol.38 (12), p.1235-1245
• Main Authors: Enderle, J.D., Engelken, E.J., Stiles, R.N.
• Format: Article
• Language: English
• Subjects: Aerodynamics; Aerospace biophysics; Biological and medical sciences; Elasticity; Eye and associated structures. Visual pathways and centers. Vision; Fundamental and applied biological sciences. Psychology; Humans; Isometric Contraction - physiology; Isotonic Contraction - physiology; Linear systems; Models, Biological; Muscles; Neural networks; Neurofeedback; Oculomotor Muscles - physiology; Predictive models; Space life sciences; Vertebrates: nervous system and sense organs; Viscosity
• ISSN: 0018-9294; 1558-2531
• DOI: 10.1109/10.137289

The muscle is modeled as a viscoelastic parallel combination connected to a parallel combination of active state tension generator, viscosity element, and length tension elastic element. Each of the elements is linear and their existence is supported with physiological evidence. The static and dynamic properties of the muscle model are compared to rectus eye muscle data. The length-tension characteristics of the model are in good agreement with the data within the operating region of the muscle. With the muscle model incorporated into a lever system to match the isotonic experiment paradigm, simulation results for this linear system yield a nonlinear force-velocity curve. Moreover, the family of force-velocity curves generated with different stimulus rates reported in the literature match the predictions of the model without parametric changes.< >