Figure 4.

Left panel: The regions where there is a significant relative blood oxygenation level‐dependent (BOLD) signal increase associated with the excitation of the left and inhibition of the right vestibular nerve (i.e., right anodal to left cathodal galvanic vestibular stimulation, condition RL) relative to rest. Areas of significant relative increase in BOLD signal (P < 0.00005, uncorrected) are shown superimposed on a surface‐rendered Montreal Neurological Institute (MNI) single‐subject template to detail the macroanatomy. The height and the exact coordinates of the local maxima within the areas of activation as well as quantitative descriptions of their cytoarchitectonic assignments are given in Table I. The green numbers in the figure point to the respective cluster label in this table. Middle panel: Detailed view on orthogonal sections at x = −38, y = −22, z = 20, i.e., the location of the local maximum of the cluster centered upon the left posterior parietal operculum (Cluster 1) corresponding to parieto‐insular vestibular cortex (PIVC). The extent of OP 1 (white), OP 2 (dark gray), OP 3 (light gray), and OP 4 (intermediate gray) is shown in different gray values; the MNI single‐subject template is shown in the background. Right panel: Detail views focused on the location of the local maximum in the right posterior parietal operculum (Cluster 2, x = 40, y = −26, z = 22)