Figure 3.

Benefits of the LSRC analysis in studying a higher-order neuron with high threshold are illustrated by simulation. A, Schematic diagram for a model neuron. The model is a spatially inhomogeneous neuron with two complex-type subunits as in Figure 2C, but the subunits have a relatively high firing threshold that prevent the cell from firing unless strong excitatory input is given. The simulations of the LSRC analysis were conducted for two different conditions: B, Full-field noise array that stimulates both subunits simultaneously. C, Half-field noise array in which the right half of the stimuli was masked, providing stimulation of only one of the two subunits. The neuron does not respond unless the entire receptive field is stimulated.