[Temporal structure of the spike trains in the neuronal impulses of the visual and sensorimotor areas of the rabbit neocortex during conditioned reflex activity].

Conjugated spikes were singled out from successions of discharges of neurones in the rabbit's visual and sensorimotor neocortical areas acting in correlation. Their temporal structure was studied at intersignal intervals in transswitching of defensive positive and inhibitory conditioned reflexes and also in pseudoconditioning. The obtained results testify that conjugated discharges appeared for the most part periodically (in the average in 85% of fragments of unit activity). At positive and inhibitory conditioned reflexes, the frequency of periodical conjugated discharges belonged in most cases to the theta-rhythm range. At pseudoconditioning, periodical conjugated discharges were in the main of frequencies of delta-range (up to 4 Hz). The obtained results testify about a great significance of cortical neurones interaction in theta-range frequency at conditioned activity.