Temporal Characteristics of Neural Activity Associated with Perception of Gustatory Stimulus Intensity in Humans

We previously reported that cortical activities of the transition between the parietal operculum and the insula (area G) showed to increase in a concentration-dependent manner using stimuli containing 30 mM to 1 M NaCl. We investigated, in this study, the relationship between the magnitude of the activity with the shortest latency and the perceived gustatory stimulus intensity. We also examined the latencies at which activities correlated significantly with neural processes encoding perceived intensity and estimated the locations of the cortical areas associated with these latencies.