Fig. 2: Monkeys performed memory-guided saccade task during fUSI acquisition.

A Memory-guided saccade task. A trial began with the monkey fixating on a center blue diamond. After the monkey fixated, a white circular cue was flashed for 400 ms in one of 8 peripheral locations. Once the center fixation diamond extinguished, the monkey made a saccade to the remembered cue location and maintained fixation on the peripheral location. If the saccade was to the correct location, the peripheral cue reappeared and the monkey received a liquid reward. Example session median [IQR] saccade latency Monkey P-399 [363, 430] ms, Monkey L-530 [500, 569] ms. B 3D vascular maps for Monkey L and Monkey P. The field of view included the intraparietal sulci for both monkeys. White scalebar–1 mm. D dorsal. V ventral. L lateral. M medial. C Coronal imaging planes in Monkey L and P. Position relative to estimated ear-bar zero (EBZ) overlaid on a NHP brain atlas⁹¹. Anatomical labels based upon Saleem et al. ²⁶. LIP lateral intraparietal area, VIP ventral intraparietal area, MIP medial intraparietal area, MP medial parietal area, ls lateral sulcus, cis cingulate sulcus, ips intraparietal sulcus. Monkey graphic in panel a was drawn by Krissta Passanante. Brain graphic in panel b generated through the Scalable Brain Atlas⁹² and a publicly available MRI rhesus macaque atlas⁹¹.