Table 1.

Clustering results from a priori nodes reveal that synesthetes cluster visual regions significantly more than controls during both the Audio and the Audiovisual conditions

NOIClusters with:p valueGroup
Audio
    Middle frontal gyrus (l)Precuneus (l)0.001C
Precuneus (r)0.001C
Middle occipital (l)0.023C
Sup. parietal lobule (l)0.041C
Calcarine sulcus (l)0.048C
Inf. orbitofrontal gyrus (r)0.064S
Visual word form area0.096C
    Middle frontal gyrus (r)Precuneus (r)0.005C
Precuneus (l)0.011C
Supp. motor area (r)0.096C
    VO2 (l)Precuneus (l)0.026S
Precuneus (r)0.026S
    Grapheme (r)Inferior occipital (l)0.004S
Sup. occipital (r)0.029S
V4 (l)0.029S
Cuneus (r)0.029S
Sup. occipital (l)0.036S
Middle occipital (l)0.036S
Lingual gyrus (r)0.043S
Middle occipital (r)0.043S
Precuneus (r)0.05S
Cuneus (l)0.05S
VO1 (r)0.05S
V4 (r)0.051S
Grapheme (l)0.055S
Calcarine sulcus (r)0.055S
Lingual gyrus (l)0.055S
VO2 (r)0.064S
Precentral (r)0.07C
VO1 (l)0.095S
Audiovisual
    Lingual gyrus (r)Visual word form area0.015S
Middle occipital (l)0.015S
Inf. occipital (l)0.015S
Inf. temporal (r)0.015S
Heschl's gyrus (l)0.015C
Middle occipital (r)0.018S
Sup. occipital (r)0.018S
Sup. occipital (l)0.024S
Inf. occipital (r)0.025S
V4 (r)0.041S
Fusiform gyrus (r)0.045S
VO1 (r)0.065S
Fusiform gyrus (l)0.076S
    Sup. parietal lobule (l)Angular (r)0.057C
    Grapheme (l)Lingual gyrus (r)0.048S
VO2 (r)0.048S
    Grapheme (r)Lingual gyrus (r)0.057S
VO2 (r)0.08S
Calcarine sulcus (r)0.08S
  • Group label indicates whether the result is significant for synesthetes (S) or controls (C). All results shown are corrected for multiple testing within each node of interest (NOI). Only significant results are shown (p < 0.1, adjusted for false discovery rate at 10% using Benjamini-Hochberg).