Figure 1.

(A) The Dual-Mode model describing vergence as preprogrammed with feedback controlled subcomponents termed the fusion initiating component (FIC) and fusion sustaining component (FSC), respectively. These components lead into the plant, which represents mostly the extraocular muscles. (B) This model generated simulated convergence responses to 4° symmetrical steps where each colored trace represents a convergence eye movement. These simulated responses are similar to experimental data. (C) The simulated responses had known underlying sources. The average FIC and FSC from the known sources shown in plot (B) are plotted in blue (labeled using arrows). The ICA algorithm computed two sources plotted in red. The known simulation sources and the ICA sources are similar; validating ICA can be used to dissect experimental convergence responses into their underlying FIC and FSC sources.