Table 1. Graphemes, colour, and synaesthesia in the brain.
| Contrast | Brain region | k | p | MNI (x,y,z) | T-value |
| Non-inducing>False fonts (P <.05FWEcorrected, N = 38) | R Supramarginal gyrus/Inf parietal lobule (BA 40) | 68 | 0.001 | 50, −46, 36 | 6.15 |
| False fonts>Non-inducing (P <.05FWEcorrected, N = 38) | R Fusiform gyrus (BA 37) | 1914 | 0.000 | 44, −60, −14 | 11.06 |
| R Middle/Inf occipital gyrus (BA 18/19) | 38, −84, −4 | 8.16 | |||
| R Fusiform gyrus (BA 37) | 34, −48, −22 | 8.11 | |||
| L Inferior occipital gyrus (BA 18/19) | 913 | 0.000 | −38, −80, −8 | 8.30 | |
| L Fusiform/Inf occipital gyrus (BA 19) | −40, −70, −14 | 7.38 | |||
| L Cerebellum/L Fusiform gyrus (BA 37) | 60 | 0.001 | −34, −42, −30 | 5.95 | |
| L Fusiform gyrus (BA 37) | −34, −52, −22 | 5.53 | |||
| Coloured>Non-inducing (P <.05FWEcorrected, N = 38) | R Fusiform gyrus (BA 37) | 1294 | 0.000 | 34, −50, −22 | 10.11 |
| R Fusiform gyrus (BA 19) | 32, −76, −16 | 8.66 | |||
| R Middle/Inf occipital gyrus (BA 18) | 34, −86, −6 | 7.77 | |||
| L Fusiform gyrus (BA 19) | 1175 | 0.000 | −30, −76, −16 | 8.89 | |
| L Fusiform gyrus (BA 37) | −34, −54, −20 | 7.30 | |||
| Interaction Synaesthetes>Controls for Synaesthesia>Non-inducing (P <.001uncorrected, SVC) | R Fusiform gyrus (BA 19) | 21 | 0.052 | 36, −76, −26 | 4.45 |
| Interaction Synaesthetes>Controls for Synaesthesia>Coloured (P <.001uncorrected) | L Superior parietal lobule (BA 7) | 712 | 0.001 | −24, −58, 46 | 5.03 |
| L Superior Occipital gyrus/Precuneus | −22, −70, 38 | 4.11 | |||
| L Inferior parietal lobule (BA 40) | −42, −44, 48 | 4.02 |
fMRI results of localiser Experiment 1 (N = 38 (synaesthetes N = 19, controls N = 19), random effects analyses, extent threshold ≥20 voxels, whole brain threshold: see table). Cluster size (k), corrected P-values at cluster-level (p), MNI coordinates of local maxima and T-values are listed. Brodmann areas (BA) are in parentheses. R = right, L = left, Inf = Inferior, SVC = Small Volume Correction.