Postsynaptic excitation and in hibition in neurons of the turtle general cortex in response to moving stimuli

Autor: Gusel'nikov, V. I., Pivovarov, A. S.
Zdroj: Neurophysiology; May 1977, Vol. 9 Issue: 3 p194-199, 6p
Abstrakt: Responses of the general cortex to moving stimuli were studied in turtles. The evoked potential, the synaptic nature of its individual components, and the mechanisms of their generation were analyzed. The evoked potential had a negative-positive sequence. The negative part consisted of a slow negative wave on which fast negative complexes were superposed. These components reflected EPSPs of afferent nature generated on dendrites of the principal neurons. The first fast negative complex was followed by a rhythmic discharge superposed on the slow negative and positve waves. The negative waves of the rhythmic discharge were shown to reflect EPSPs and the positive waves IPSPs, probably generated on dendrites of cortical neurons. The rhythmic EPSP — IPSPs are evidently generated by a feedback mechanism, whereas the positive wave reflects dendritic IPSPs of the principal neurons.
Databáze: Supplemental Index