[Effect of a conditioned emotional state on the discharging behavior of single neurons of the rat dorsal lateral geniculate body].
1. The spike activity of 155 cells of the dorsal geniculate body of rats was recorded under the influence of flash and the combination of flash with a tone. For test animals the tone has an emotional relevance (ERT), because they had been trained to learn a conditioned emotional reaction with the tone as conditioned stimulus. Controls had been sham trained, i.e. the tone was never reinforced and therefore without emotional relevance (EIT). 2. In the controls there was no difference in the quantity of facilitatory and inhibitory responses to the tone, whereas under ERT there were more often facilitations than inhibitions. 3. The tone changed the reaction to flash. This variation depends on the emotional relevance of the acoustic stimulus. The ERT evoked a stronger increase in the number of excitations than the EIT. The number of inhibitions decreased equally under both conditions. Also, the ERT changed the strength of the flash response more often than the EIT did. An increasing trend of excitation was found especially in primary positive cells, an increasing trend of inhibition especially in primary negative ones. The time course of responses shows these differences to occur in the primary positive cells essentially later than 200 mse cafter the stimulus, in the primary negative cells, however, within this interval.
D000161:Acoustic Stimulation; D003214:Conditioning, Classical; D005829:Geniculate Bodies; D008027:Light; D008839:Microelectrodes; D009474:Neurons / Q000502:physiology*
Der Einfluss eines bedingten emotionellen Zustandes auf das Entladungsverhalten von Einzelzellen des doesalen Corpus geniculatum laterale der Ratte