title: [Multicellular spiking of the cat somatosensory cortex at rest and during spontaneous EEG activation].
abstract: In chronical experiments on unanesthetized unrestrained cat multineuronal discharges and EEG were simultaneously recorded from the somatosensory cortex by the same semimi-croelectrode. The discharges were automaticaly separated into three amplitude levels. Three types of basic multineuronal discharge patterns were classified: continuous, bursting and grouped ones. During visually similar periods of spontaneous EEG activation the multineuronal discharges exhibited different and variable changes. The amplitude discrimination method revealed at different discharge levels parallel discharge frequency rise or fall or absence of changes in the average frequency. The kind of multineuronal discharge reorganization depended on the intensity of the EEG activation. The computer analysis showed the prevalence of the excitatory effects (55%), but inhibitory changes were also rather significant (21%). The experimental data suggest a complicated and highly dynamic functional structure of the spontaneous brain activation process at the level of neuronal populations.
mesh_terms: D000818:Animals; D002415:Cats; D004569:Electroencephalography; D009433:Neural Inhibition; D012146:Rest; D013003:Somatosensory Cortex / Q000502:physiology*
vernacular_title: Mil'tikletochnaia impul'satsiia somatosensornoĭ kory koshki v sostoianii pokoia i pri spontannoĭ aktivatsii EEG.