Table 4.
MNI coordinates and statistics for brain regions showing significant response for the main effect of difficulty (Random > Ordered, collapsed across all other conditions). Regions grouped by contiguous clusters. Z scores drawn from local maxima. Peak p was < 0.001 for all clusters.
| Brain Area | Hemisphere | Brodmann Area | z score | x,y,z (mm) | Cluster Size (# of Voxels) |
|---|---|---|---|---|---|
| Middle Temporal Gyrus | L | 22 | > 8.2 | -60, -34, 1 | 1480 |
| Middle Temporal Gyrus | L | 21 | 6.71 | -63, -22, -5 | |
| Superior Temporal Gyrus | L | 21 | 6.12 | -51, -25, -5 | |
| Middle Temporal Gyrus | R | 21 | 7.28 | 66, -22, -5 | 1143 |
| Middle Temporal Gyrus | R | 21 | 6.79 | 60, -13, -8 | |
| Superior Temporal Gyrus | R | 21 | 6.74 | 51, -28, 1 | |
| Middle Frontal Gyrus | L | 9 | 7.08 | -39, 11, 28 | 1428 |
| Insula | L | 13 | 6.91 | -30, 23, 4 | |
| Orbitalfrontal Cortex | L | 47 | 6.66 | -36, 20,-2 | |
| Inferior Frontal Gyrus (extending into thalamus) | R | 47 | 6.86 | 33, 26, -5 | 2182 |
| Inferior Frontal Gyrus | R | 45 | 6.53 | 33, 26, 7 | |
| Middle Frontal Gyrus | R | 46 | 5.22 | 42, 17, 25 | |
| Superior Frontal Gyrus | L | 6 | 6.42 | -6, 11, 55 | 927 |
| Superior Frontal Gyrus | L | 8 | 5.69 | -3, 20, 52 | |
| Superior Frontal Gyrus | R | 8 | 5.47 | 6, 26, 49 | |
| Cerebellum | R | 6.32 | 3, -55, -20 | 1771 | |
| Cerebellum | R | 6.12 | 9, -76, -17 | ||
| Cerebellum | L | 6.11 | -3, -82, -14 |