Fig. 5.

Tonotopy and tuning curves in the auditory cortex. A) Tonotopic map in the auditory cortex (AC) of tinnitus patients and controls. White dashed lines indicate Heschl's gyrus (HG). B) Proportion of voxels responding highest to a specific frequency in the tonotopic localizer, or the tinnitus pitch (gray shaded area). On the contralateral site, fewer voxels responded to tinnitus pitch in the patient than in the control group. C) Tuning curve depicting the responsivity to non-preferred frequencies across voxels in the auditory cortex in the two groups. The x-axis denotes the frequency presented and its distance from the best-frequency (BF) in octaves. Responses to non-preferred frequencies in the contralateral AC were significantly higher in the patient group.