Voxels within auditory cortex sensitive to auditory stimuli are also sensitive to perceptual state. The pattern of voxel by voxel activity levels within the AC ROI reveals a consistent relationship between the strengh of the auditory response and the effect of percept. Shown here is data from the subject with median correlation value between the beta for sound and the beta for the perceptual regressor. When analyzing the correlation values across the entire subject group, the z-scores of these correlation values were significantly negative (p < .05), indicating that voxels with a stronger level of activation for sound also had a stronger effect of percept, with the split percept causing greater activity than the grouped percept. Each point represents a single voxel within the ROI, and axis values indicate coefficients obtained from the GLM (arbitrary units).
Hill et al. BMC Neuroscience 2011 12:85 doi:10.1186/1471-2202-12-85