[Effect of neuroactivating amino acids on the system activating sympathetic preganglionic neurons]

In anesthetized cats, the bioelectrical responses were recorded in T3 white ramus during stimulation of intercostal nerve of the T3 segment and of descending pathways (dorsolateral funiculus) of the C5 segment. The effects of GABA, glycine (and its synaptic antagonists picrotoxin and strychnine), and of glutamic acid on different components of the responses were not identical which suggested different sites of the activity effects of glutamic acid and of the inhibitory effects of GABA and glycine in the central pathways for activation of the sympathetic preganglionic neurons.