Article Figures & Data
Figures
- Figure 1.
Regions showing greater activity for remember than for high confidence familiarity judgments (a, c, e) and those showing increasing activity related to increases in familiarity confidence (1→4 judgments) (b, d). Activities on the cross sections are rendered onto the normalized T1 anatomical images averaged across volunteers; those on the lateral surface are rendered onto the MNI normalized canonical brain (Cocosco et al., 1997). All activated clusters exceeded an uncorrected threshold of p < 0.001 and were at least five voxels in size. Parameter estimates at the maximum peak of each region (MNI coordinates as indicated) are plotted for each of the five possible response categories.
Tables
Recognition judgments Word type R 4 3 2 1 Proportion of responses Old 0.38(0.18) 0.32(0.13) 0.17(0.08) 0.09(0.06) 0.03(0.03) New 0.02(0.19) 0.07(0.07) 0.18(0.09) 0.37(0.11) 0.34(0.18) Mean reaction time (ms) Old 1346 (155) 1645 (325) 1803 (258) 1842 (251) 1808 (532)1 New 1499 (352)2 1789 (370)3 1784 (248) 1762 (270) 1601 (234)4 -
Values are across-subject means (SD). 1-4The mean reaction times for “1” judgments to old items, R judgments to new items, “4” judgments to new items, and “1” judgments to new items are based on 13, 11, 15, and 15 subjects, respectively. The remaining subjects did not make any such judgments.
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- Table 2.
Brain regions showing significantly greater BOLD signal (p < 0.001) for remember responses than for high confidence familiarity responses
MNI coordinates Region of activity Left/right BA Number of voxels x y z Z value Medial frontal gyrus L 10 431 −6 54 −6 4.29 R 10 30 9 63 21 3.75 Middle frontal gyrus L 11 20 −30 39 −12 4.03 R 11 8 24 30 −15 3.57 Precentral gyrus R 6 5 63 3 27 3.93 Posterior cingulate L 30 21 −3 −54 6 3.71 Cingulate gyrus L 31 286 0 −45 30 4.54 Postcentral parietal gyrus R 40 27 60 −24 15 3.77 L 40 37 −54 −27 18 3.91 L 5 14 −21 −42 63 4.1 R 3 10 36 −36 60 4.14 L 3 5 −45 −21 39 3.64 R 3 7 54 −12 48 3.46 Superior temporal gyrus L 22 151 −42 −54 15 4.58 L 13 38 −54 −42 21 3.99 L 22 9 −45 −3 −3 3.42 Middle temporal gyrus R 39 5 54 −69 9 3.46 R 22 9 57 −48 3 3.45 L 37 17 −54 −63 0 4.03 R 21 7 66 −39 −3 3.45 Hippocampal formation L 69 −24 −21 −21 4.22 R 12 30 −21 −21 3.58 Parahippocampal gyrus L 19 39 −15 −51 −15 4.44 Lingual gyrus R 19 7 15 −60 −15 3.63 Insula L 13 20 −45 −6 12 4.43 Lentiform nucleus R 11 18 −3 12 4.72 - Table 3.
Brain regions showing significant BOLD signal correlations (p < 0.001) with familiarity confidence
MNI coordinates Region of activity Left/right BA Number of voxels x y z Z value Increasing with familiarity (1→4) Anterior middle frontal gyrus L 10 129 −36 57 −3 4.3 Inferior/middle frontal gyrus L 45 110 −48 24 21 4.58 Medial frontal gyrus L 6 21 −6 30 42 3.75 Angular gyrus L 39 200 −33 −60 36 4.54 Inferior parietal lobule R 40 20 39 −51 36 3.85 Superior parietal lobule R 7 10 36 −66 48 3.59 Precuneus R 7 190 9 −72 36 6.85 Cingulate gyrus L 23 22 −6 −24 24 4.38 Insula L 13 10 −33 15 −6 3.69 Caudate R 6 9 15 3 3.5 Lentiform nucleus R 8 21 15 6 3.4 Decreasing with familiarity (4→1) Middle frontal gyrus R 8 6 27 9 39 3.91 Medial frontal gyrus R 11 5 6 51 −12 3.3 Anterior cingulate R 32 5 3 30 −9 3.46 Cingulate gyrus R 24 15 6 0 39 3.88 Cuneus L 18 8 −9 −96 6 3.31 Inferior temporal gyrus L 37 7 −48 −69 0 3.47 Hippocampal formation L 9 −18 −18 −21 3.77 Insula L 13 12 −45 −27 18 3.65 Cerebellum L 18 30 −51 −30 3.82
