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  • Title: [Changes in pyramidal tract response to direct stimulation of the sensomotor cortex of the rabbit during formation of a conditioned reflex].
    Author: Kozhedub RG, Shlikhtar Kh.
    Journal: Zh Vyssh Nerv Deiat Im I P Pavlova; 1986; 36(5):880-5. PubMed ID: 3026116.
    Abstract:
    Changes of pyramidal tract (PT) response were analyzed, reflecting the final result of cortical interaction in the process of combinations of direct stimulations of cortical surface in nonimmobilized and unanaesthetized rabbits. It has been shown that in a situation, modelling conditioning, changes take place of the first direct component--the D-component--of the PT response (reflecting the excitability of the PT neurones), as well as changes of the successive indirect synaptic component--I-component (reflecting the excitability of presynaptic cortical elements and of intracortical synaptic connections). I-component changes were significantly more expressed. In most cases the I-component of the response was increased. The obtained data testify to an increase of synaptic efficiency in the process of temporary connection formation and to possible change (increase or reduction) of excitability of PT neurones.
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