Cellular discharge of VMM cells during eating, drinking, and micturition. Cellular activity of an ON cell decreased during ingestion of chocolate chip (A1), wafer (A2), and cookie (A3). Cellular activity of another ON cell during ingestion of laboratory chow (B1), yogurt drop (B2), or nibbling of paper (B3) is shown. (C) Decrease in cellular activity of an ON cell during drinking. (D) Decrease in cellular activity of an ON cell during micturition.