| Abstract: | The specific character of the relationship of the baseline cellular activity of the caudate nucleus to the features of the
impulse activity of the centrum medianum of the thalamus has been identified in chronic microelectrode experiments. Reciprocal
changes in the bioelectrical activity were recorded in the first group of cells, with a low action potential repetition frequency,
while unidirectional changes with reorganizations in the intralaminar nucleus were recorded in the second. The activation
of the cells of the centrum medianum of the thalamus was accompanied during the formation of an instrumental conditioned defense
reflex by the formation of a pattern of impulse activity in neurons of the neostriatum which coincided in sign with the reorganizations
which were characteristic during the investigation of the baseline activity. It is hypothesized that the features of the internal
structure of the caudate nucleus underlie such a relationship.
Laboratory of Physiology of Higher Nervous Activity, I. P. Pavlov Institute of Physiology, Russian Academy of Sciences, Saint
Petersburg. Translated from Fiziologicheskii Zhurnal imeni I. M. Sechenova, Vol. 80, No. 1, pp. 102–108, January, 1994. |
