Figure 3.

Modulation of neuronal firing between stimuli presentation. (A–C) PSTH (180 trials) of two equal stimuli (50 ms; 80 dB; 5322 Hz) separated by either 150 ms (left) or 300 ms (right). Three example neurons during the attentive task show suppressive activity during stimuli presentation followed by an increased firing until S2 is presented. (D,E) PSTHs of two different neurons showing firing activity during the interval that decreases toward the second stimulus. (F) PSTH of an example neuron showing a late onset response accompanied by a sustained activity after stimuli termination.