Figure 9.
Spiking of the V4 neuron in time to correlated stimulus input.
All plots are to excitatory input firing rates of 40 Hz. Preferred input was correlated at the 0 ms phase of oscillation while non-preferred input was correlated at 12 ms phase. Stimulation period is 0.3-0.65 s. (A) The V4 neuron’s response to correlations in the preferred stimulus presented alone with out-of-phase inhibition (Attend P) is represented by the solid black line. Response to preferred and non-preferred stimulus inputs present together with inhibition out-of-phase with the preferred input correlations (NP + Attend P) is depicted by the dashed line. Both stimuli present together with inhibition out-of-phase with non-preferred input correlations (P + Attend NP) is shown by the dotted line, and the dot-dashed line represents response to non-preferred stimulus presented alone with out-of-phase inhibition (Attend NP). (B) The phase of the four spike responses (shown in panel A) of the V4 neuron with respect to the 40 Hz oscillation phase of the input, are respectively plotted from top to bottom. The neuron’s response phase resembles the phase of the dominant excitatory input to the neuron that is not shunted by correlated inhibitory spikes from Iff.