Assessment of dual-mode and switched-channel models with experimental vergence responses

You Yun Lee, J. L. Semmlow, Tara L. Alvarez

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Controversy exists in the literature regarding the basic neural control structure that mediates convergence responses. This study constructed and simulated two models, the switched-channel feedback model and the dual-mode model consisting of preprogrammed with feedback control. Models were constructed and compared to experimental data. The stimuli consisted of 2° and 4° vergence steps. Both closed- and open-loop settings were utilized. After parameter adjustment, both models could accurately simulate step responses from subjects having a range of response dynamics. The model with a preprogrammed element required less parameter modification when stimulus amplitude changed. Both models could accurately simulate some attributes of vergence; however, neither model could represent the modifications commonly observed within the transient portion of the vergence response.

Original languageEnglish (US)
Article number2
JournalJournal of Eye Movement Research
Volume5
Issue number2
StatePublished - 2012

All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems

Keywords

  • Convergence
  • Dual-mode model
  • Switched-channel model

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