[Effect of parenterally administered amino acids and protein hydrolysate on the electrical activity of brain...

Glycin, glutamic acid or casein hydrolysate induced high frequency and high voltage electrical waves in the brain-stem RF and often in the lateral hypothalamic nucleus and cortex. These changes were more obvious during feeding of the dogs. Sham feeding and parenteral administration of glucose or 0.9% solution of NaCl evoked responses different from the above ones. Gastric secretion stimulated by i.v. administration of nitrous substances by food was not directly related to the above responses either. The impulses responsible for the secretion seem to arise at another level of the brain.