Fig. 2.

ROI analyses of percentage signal change in left and right IFG (8 mm spheres centred around peaks in Brodmann area 44, 45 and 47 from Whitney et al. (2011a) and implicated in semantic control). Error bars indicate standard error of the mean. L=left hemisphere; R=right hemisphere. The charts show easy and hard judgements for non-semantic tasks (non-sem), verbal semantics (verbal sem) and picture semantics (picture sem). Significant effects are summarised next to each graph (see Table 6 for details).