Correlation-spectral characteristics of cortical potentials in a wide frequency range in dogs in the process of elaborating a lever-pressing alimentary conditioned response.

Power spectra (PS) and cross-correlation coefficients (CC) of the background electrical activity (2-100 Hz) in different neocortical areas were studied in dogs in the state of quiet wakefulness (QW) and after elaboration of motor (lever-pressing) alimentary conditioned responses (CR). Regional differences revealed that in all the frequency bands, including the high-frequency frequencies, there was a significant increase of power in the frequency band of 61-100 Hz which was not the same in different cortical areas after CR elaboration. This shows that not only their information value of high frequency bioelectrical processes but also their neuronal origin is essential. After elaboration of the same CR, individual EEG peculiarities observed in the QW became levelled and the functional state became characteristic for this type of conditioning and was reflected in the distributions of CC and PS of the background activity.