Figure 3.
a–d, Brain areas activated by early adaptation to prisms and postprism de-adaptation. a, b, Activations in right and left parietal cortex revealed by contrasting pointing in the early versus late phase of adaptation (run 2 > run 3), displayed in red on a 3D brain template, showing a peak in left intraparietal sulcus extending to inferior parietal lobule (IPS/IPL, peak x, y, z = −30, −68, 40) (a) and right intraparietal sulcus extending to superior parietal lobule (IPS/SPL, peak x, y, z = 40, −54, 66) (b). c, Activation in right cerebellum [peak x, y, z = 24, −38, −32, corresponding to lobule IV and V according to Schmahmann (1999)] revealed by the same contrast. Results are also displayed on the average brain of the 11 subjects with horizontal sections at z = 46 (a) and at z = −32 (c). d, Activation in the left parietal cortex was also found during the de-adaptation phase by contrasting pointing trials during run 4 (without prism but postprism exposure) relative to pointing during run 1 (baseline without prism), displayed in green (peak x, y, z = −48, −58, 52).