Looking into Task-Specific Activation Using a Prosthesis Substituting Vision with Audition
Figure 6
Brain activation patterns related to location as contrasted to orientation discrimination, that is, using the contrast {localization minus orientation masked (inclusive) by localization minus rest}, with the SSD and in vision. Positive differences exceeding an uncorrected threshold of were displayed according to the color scales that code the -values. The statistical parametric map for each comparison was superimposed on the axial, coronal, and sagittal sections of an individual normalized brain MRI. The brain activation pattern observed with the SSD (a) included brain areas mainly in the right dorsal visual pathway, including the superior occipital gyrus, precuneus, inferior, and superior parietal lobules (see Table 2 for the exhaustive list of the activation foci). The red circle indicates an activation focus in the right superior parietal lobule ( (mm) = 8, −68, 62; 11 voxels). The corresponding brain activation pattern observed in vision (b) also included brain areas in the dorsal visual pathway with a slight predominance in the right hemisphere (see Table 3). The red circle indicates an activation focus in the right superior parietal lobule ( (mm) = 26, −66, 66; 86 voxels).
