SUPPRESSION OF FUNCTIONAL CONNECTIONS BET WEEN THE NEURONS DEPENDING OF THEIR CURRENT FREQUENCY CHANGES DURING PERFORMANCE OF MOTOR REACTIONS BY CATS

Multiunit activity in the motor cortex of cats was analysed in the pro cess of food-procuring conditioning to time (interval of 2 min). Funct ional connections between pairs of neurons each of which changed its c urrent firing frequency during performance of the food-procuring movem ent were analysed by crosscorrelation method. The same method was impl emented for the analysis of functional connections between pairs of ne urons which demonstrated no changes in their activity during condition ed movement. Total number of significant correlations in the phase of passive waiting was less between non-reactive neurons than between rea ctive ones. In the phase of active waiting this difference was elimina ted. Relative increase in the number of correlations in the active wai ting phase as compared with the passive one was higher in the pairs of non-reactive neurons. This finding is considered as intensification o f information analysis and processing in the active phase. Lability of the functional connections was higher in the pairs of reactive neuron s which might provide their capability for correction of the functiona l structure in the case of quick change in a situation or internal sta te of the animal.