EFFECTS OF TASTE STIMULATION ON THE EFFERENT ACTIVITY OF THE AUTONOMIC NERVES IN THE RAT

Effects of taste stimulation on the efferent discharges in the pancreatic and hepatic branch of the vagus nerve, and those in the adrenal, pancreatic and hepatic branch of the splanchnic nerve, and the sympathetic nerve innervating interscapular brown adipose tissue, were observed in the anesthetized rat. Sweet taste stimulation with 5% glucose or 10% sucrose caused an increase in activity of pancreatic and hepatic branch of the vagus nerve and brown adipose tissue nerve, and a decrease in discharge rate of the adrenal, pancreatic and hepatic branch of the splanchnic nerve. Salty taste stimulation with 5% NaCl resulted in opposite effects in these nerves. Results suggest preabsorptive reflex control of visceral functions due to taste stimulation.