Figure 4.
Simultaneous recordings from neurons in each cingulate region. Each column of PSTHs were simultaneously recorded with three different electrodes during visceral and cutaneous stimulation (asterisk, significant response; CuSum p<0.001). The onset and offset of innocuous (clear) and noxious (shaded) stimuli are marked with a bar above each response. The shift from prominent visceral drive in ACC to prominent cutaneous drive in RSC is apparent and, therefore, cannot be attributed to variations in the level of anesthesia.
