Article Figures & Data
Figures
- Fig. 1.
Schematic illustration of trial events. Trials were initiated by the rat making a sustained nose poke into the central of three holes. At the start of the variable foreperiod, a cue was presented to the left or right. The target could also appear on the left or the right. The side of the cue did not predict the side of the target; for 50% of trials, the target was on the same side as the cue (validly cued), and for the remaining 50%, it was on the opposite side (invalidly cued). The rat reported the location of the target by making a nose poke response in the side hole.
- Fig. 2.
Parvalbumin-stained coronal sections at approximately bregma −3.4 mm from the brain of one rat. The unlesioned TRN is shown in the left, and the lesioned tissue is shown on the right. All sectors of the TRN between coronal levels −3.0 and −3.8 mm were lesioned in most rats. The TRN was spared anterior to bregma −2.2 mm.
- Fig. 3.
This figure shows the mean ± SEM reaction time of 14 rats who had sustained unilateral lesions of the TRN. For responses to ipsilateral targets, reaction time is faster for validly cued trials at the shortest foreperiod. For reaction time to contralateral targets, there is no reaction time difference between validly and invalidly cued trials.
- Fig. 4.
This figure shows the mean ± SEM validity effect (invalid minus valid reaction time), preoperatively and postoperatively, for ipsilateral and contralateral responses. Preoperatively, the validity effect is equal for responses to either side. The validity effect is not seen in the postoperative data on the contralateral side, indicating an abolition of the benefit of attentional orienting to contralateral cues. There was no change in the magnitude of the validity effect on the ipsilateral side.
