Fig. 1

Distribution of GFP-positive neurons and TPH-containing neurons in the DRN. a, b Fluorescent images of GFP-positive neurons (green) and TPH-containing neurons (red) at the level of the caudal and rostral DRN. The numbers in the upper right of the images represent the distances from Bregma. GFP-positive neurons were present within lateral areas of the DRN and absent at the midline areas, whereas TPH-containing neurons were densely distributed at the midline areas. c Schematic of the sites of the neurons from which electrophysiological properties were obtained. The different symbols represent the types of tested neurons: GFP-positive neurons (GFP(+); filled circle), GFP-negative neurons located in medial DRN (mGFP(−); square), and GFP-negative neurons located in lateral DRN (lGFP(−); triangle). The numbers on the lower right of the coronal sections represent the distances from Bregma