[The mapping of spike-wave discharges in WAG/Rij rats (a genetic strain of absence epilepsy)].
The electrical activity of different cortical areas was recorded in 37 WAG/Rij rats under conditions of chronic experiment. The typical for absence epilepsy spike-wave discharges occur in EEG of all the animals of the strain. The average amplitude distribution maps were constructed based on the recording of two main components of the spike-wave discharge. The most frequently occurring discharges of 5-9 s in duration were taken for map construction. Separate maps were constructed for the beginning and for the end a discharge. It was shown that at the beginning of a discharge the maximum of spike amplitude was localized in the frontal cortical area in the site of localization of the eye, vibrissa and chewing movement centers. At the same time, the wave was better pronounced in the occipital cortical areas. At the end of a discharge spike amplitude diminished and the cortical square over which it was manifested was cut down. On the contrary, at the end of a discharge were amplitude increased and the area of its distinct recording spread to the frontal cortical areas. The wave amplitude maximum was observed over the cortical areas 17. The obtained evidence suggest the relatively independent spatio-temporal dynamics of the two main components of the spike-wave discharge complex.
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
G D
GD
Kuznetsova
A M
AM
Spiridonov
D000200:Action Potentials / Q000502:physiology; D000818:Animals; D001931:Brain Mapping / Q000379:methods*; D002540:Cerebral Cortex / Q000502:physiology*; D004567:Electrodes, Implanted; D004569:Electroencephalography / Q000379:methods; D004832:Epilepsy, Absence / Q000235:genetics / Q000503:physiopathology*; D051381:Rats; D011919:Rats, Inbred Strains / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted
Kartirovanie razriadov pik-volna u krys linii WAG/Rij (geneticheskaia liniia absence-épilepsii).