Fig. 5
Voxel-based morphometry results. Statistical parametric maps of regional grey matter volume positively associated with performance on sine-wave speech processing tasks for the combined patient cohort. The top panels show grey matter correlates of sine-wave number and place name identification accuracy; the middle panels, correlates of significant performance discrepancy between the sine-wave conditions (performance advantage for sine-wave numbers or place names); the bottom panels, correlates of the perceptual learning effect over the sine-wave number session (see text for details). Maps are rendered on sections of the group mean T1-weighted brain magnetic resonance image, thresholded at p < 0.001 uncorrected for multiple voxel-wise comparisons over the whole brain for display purposes (areas shown were significant at p < 0.05FWE for multiple comparisons within a pre-specified neuroanatomical ROI; see Table 3 and Additional file 5). The left hemisphere is presented on the left for coronal sections and on top in the axial section; Montreal Neurological Institute (MNI) coordinates for the plane of each section are indicated. The colour bar codes voxel-wise t scores for each map