BOLD activation that is greater for compensated than no-step trials. BOLD activation that is greater for compensated than no-step trials. Cortical activation that is greater for no-step trials versus fixation (a), compensated trials versus fixation (b), and compensated versus no-step trials (c) was rendered onto an MNI-normalized inflated surface. Activation is displayed at an uncorrected p < 0.0001. Clusters that met significance at a FWE-corrected p < 0.05 are displayed in Table 1. Group event-related time courses (bottom) were calculated for each trial type within a 3 mm sphere centered on the maximally activated voxel in FEFs, IPS, right SEFs extending into ACC (SEF/ACC), and right IFC. For FEF and IPS, time courses were averaged across right and left hemispheres. Error bars indicate SEM. Katharine N. Thakkar et al. J. Neurosci. 2014;34:8918-8929 ©2014 by Society for Neuroscience