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. 2008 Mar 13;363(1500):2187–2199. doi: 10.1098/rstb.2008.2271

Figure 6.

Figure 6

(a) Experimental procedures in the FOK tasks. Subjects were required to recall word answers to general knowledge questions, such as ‘Who first conquered Mt Everest?’ during fMRI scans. By pressing buttons, they indicated whether or not they had recalled the target words or not. Then they wrote their recalled answers to the questions or they judged their degree of FOK for the questions they could not recall the answer to, on a scale of 1–3: 3=‘I definitely could recall the answer if given hints or more time’; 2=‘I probably would recognize the answer’; and 1=‘I definitely did not know’. Each trial was sorted into trial type (recalled, FOK3, FOK2 and FOK1) according to the participant's judgement and was subjected to event-related fMRI analysis. (b) Regions showing greater activity when the subjects had a greater FOK. A and B, inferior frontal gyrus (BA 47); C, anterior cingulate cortex/supplementary motor area (BA 32/24/6); D and E, middle frontal gyrus (BA 10, BA 46/9). Adapted from Kikyo et al. (2002).