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Model-based analysis of dynamics in vergence adaptation

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3 Author(s)
W. Yuan ; Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA ; J. L. Semmlow ; P. Muller-Munoz

We previously proposed a model to study the dynamics of disparity vergence responses. This model was based on known physiology and consisted of pulse and step neural control processes feeding a linear second-order oculomotor plant. Here, we apply a slightly modified version of that model to analyze the influence of short-term adaptation on vergence dynamics. This analysis showed that, unlike normal vergence responses, adapted responses could not be accurately simulated without a delay between the step and pulse components. Through simulations of normal vergence and adapted vergence responses, we found a strong correlation between delay of the step signal and the size of the movement overshoot. This correlation suggests a strong interaction between neural process generating the pulse and step motor control signals

Published in:

IEEE Transactions on Biomedical Engineering  (Volume:48 ,  Issue: 12 )