title: Model-based analysis of dynamics in vergence adaptation.
abstract: 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.
authors.affiliation: Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08855-0909, USA.
authors.forename: W
authors.initials: W
authors.lastname: Yuan
authors.forename: J L
authors.initials: JL
authors.lastname: Semmlow
authors.forename: P
authors.initials: P
authors.lastname: Muller-Munoz
mesh_terms: D000222:Adaptation, Physiological; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D012016:Reference Values; D012438:Saccades / Q000502:physiology; D015357:Vision Disparity / Q000502:physiology*