Figure 1 .

(a) Hypothetical circuit illustrating the different cell types and their connectivity in the primate neocortex. The basic circuit involving different cell types is at the bottom. The inset at the top illustrates the recurrent connections between P cells encoding the same feature (motion direction in this case) and inhibitory connection between neurons/columns encoding different features. (b) Consequences on recurrent excitation of groups of P cells when increasing the proportion of CR interneurons (increase in the size of the green circle) and decreasing the proportion of PV interneurons (decrease in the size of the red circle). (c) Consequences on recurrent excitation of groups of P cells when increasing the proportion of PV interneurons (increase in the size of the red circle) and decreasing the proportion of CR interneurons (decrease in the size of the green circle). (d) Visual sequence of events for delayed match-to-sample task (DMTS). (e) Image of the macaque brain reconstructed from MRI showing the recorded cortical areas, with MT in green, MST in blue, and LPFC in red.