Fig. 3.

Brain activation foci observed during interference conditions as contrasted to congruent trials (Stroop effect) in each group.

In each group, the brain regions activated in the contrast [(Auditory incongruent + Visual incongruent) > (Auditory congruent + Visual congruent)] are displayed according to the colour scale that codes for the activation level based on the t-values. The activation maps are superimposed on the sagittal, coronal and transverse sections of an individual normalized brain MRI. In the tinnitus patients (TP) group (upper part of the figure), the brain activation foci included the left middle frontal gyrus (Brodmann area (BA) 8–9) (A), the left precuneus (BA 7) (B) and the left thalamus (C), as well as the right middle frontal gyrus (BA 9) (D), the right insula (BA 13) (E), the right superior temporal gyrus (BA 22) (F), the right middle temporal gyrus (BA 39) (G) and the right inferior parietal lobule (BA 40) (H). There was a bilateral activation of the cingulate gyrus (BA 24) (I) and the left superior parietal lobule (BA7) (J) was also activated. In the control subjects (CS) group (lower part of the figure), the brain activation foci included the left middle frontal gyrus (BA 9) (A), the left inferior parietal lobule (BA 40) (B), the right superior frontal gyrus (BA 6–8) (D), the cingulate gyrus bilaterally (BA 24) (E) and the left superior parietal lobule (BA 7)/postcentral gyrus (BA 2) (F). In addition there was a small voxels cluster (not significant) in the left inferior temporal gyrus (BA 20) (H). R: right, L: left.