Schematic depiction of two monkey experiments that were simulated by the continuous recurrent network model.

<p>(A) Reaction-time version of a two-alternative forced-choice direction discrimination task. A trial began when the monkey fixated a point on the display monitor. Two choice targets then appeared in the periphery. One was within the response field (RF) of the recorded neuron, and the other was in the opposite hemisphere. After a delay, a dynamic random-dot display appeared, where a fraction of dots moved coherently toward one of the two targets while the others moved randomly in all other directions. The monkey was allowed to make a saccadic eye movement toward a target at any time when it was ready. (B) Direction identification task. After fixation, a random-dot motion stimulus appeared inside a target ring and lasted 1 s. When the fixation point was extinguished, the monkey made a saccadic eye movement to the location on the target ring toward which the dots had moved. On some trials, electrical stimulation was simultaneously applied to MT neurons.