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Sensitivity analysis of human oculomotor muscle model
L S Baczkowski1, J D Enderle, E J Engelken
1Department of Electrical & Electronics Engineering North Dakota State Univ., Fargo 58105.
Biomedical Sciences Instrumentation
|January 1, 1990
Summary
Sensitivity analysis confirms parameters in a fourth-order linear homeomorphic oculomotor model are robust. The model accurately predicts empirical data even with considerable parameter variation.
Area of Science:
- Oculomotor Systems
- Biomechanical Modeling
- Systems Biology
Background:
- The oculomotor system controls eye movements, involving complex biomechanical interactions.
- Accurate modeling is crucial for understanding eye movement disorders and developing treatments.
- Previous models required extensive parameter tuning for accurate predictions.
Purpose of the Study:
- To perform a sensitivity analysis on a fourth-order linear homeomorphic oculomotor model.
- To validate the robustness of model parameters derived from mathematical analysis.
- To assess the model's ability to match empirical data under parameter variation.
Main Methods:
- Applied sensitivity analysis to identify critical parameters in the oculomotor model.
- Modeled each eye muscle as a viscoelastic parallel combination.
- Represented the eyeball as a sphere with moment of inertia and Voight elements.
Main Results:
- Sensitivity analysis indicated that mathematically derived parameters are suitable as nominal parameters.
- The model demonstrated acceptable performance across a range of parameter variations.
- Analytical parameters showed considerable flexibility while maintaining predictive accuracy.
Conclusions:
- The updated oculomotor model is robust and its parameters are reliable.
- The model's flexibility allows for accurate prediction of empirical data.
- This validates the use of analytical parameters in oculomotor system modeling.