[Non-synaptic inhibition in the cortex of the cat].
Experiments were carried out on cats under pentobarbital anaesthesia. Two stimulating electrodes (S1 and S2), a recording macroelectrode and K+-selective microelectrode were placed on g. suprasylvius. A strong stimulus applied through S1 elicited slow negativity (SN) and increase in [K+]o. At that time the dendritic potential (DP) evoked by stimulation through S2 was depressed. The depression of DP correlated with the voltage of SN and with the level of [K+]o. It is suggested that DP depression is caused by presynaptic action of K+ ions.
D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology*; D003712:Dendrites / Q000502:physiology; D008564:Membrane Potentials / Q000187:drug effects; D009433:Neural Inhibition; D011188:Potassium / Q000502:physiology; D019789:Tetraethylammonium; D013757:Tetraethylammonium Compounds / Q000494:pharmacology
D013757:Tetraethylammonium Compounds; D019789:Tetraethylammonium; D011188:Potassium
O nesinapticheskom tormozhenii v kore mozga koshki.