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РЖ ВИНИТИ 34 (BI24) 95.12-04М3.547

Steriade, M.
Relations between cortical and thalamic cellular events during transition from sleep patterns to paroxysmal activity [Text] / M. Steriade, D. Contreras // J. Neurosci. - 1995. - Vol. 15, N 1. - P623-642 . - ISSN 0270-6474
Перевод заглавия: Связь между корковыми и таламическими клеточными процессами при переходе от паттернов сна к пароксизмальной активности
Аннотация: The authors investigated in anesthetized cats the progressive development from EEG-synchronized sleep pattens to lowfrequency (15 Hz) paroxysmal activities, most of them consisting of epileptic-like seizures with spike-wave (SW) complexes at 2-4 Hz. We used multisite extra- and intracellular recordings of neocortical, reticular thalamic (RE), and thalamocortical (TC) neurons, including dual impalements of cortical and TC cells. A subsample (40%) of TC cells discharged spike bursts at 2-4 Hz, in close time relation with the spiky, depth-negative field components of SW seizures in related neocortical areas. Full synchronization among TC cells that were resonant with the cortical seizure activity was progressively reached toward the end of the SW paroxysm. The remaining TC cells (60%) were inhibited during the cortical SW seizures. We show that the duration and amplitude of hyperpolarization in TC cells paralleled the extent of cortical EEG paroxysm. Dual intracellular recordings of cortical and TC neurons demonstrate that during the cortical SW seizure, consisting of a tonic depolarization with superimposed paroxysmal spike bursts, the simultaneously recorded TC neurons displayed a tonic hyperpolarization associated with repetititve IPSPs, closely time related with cortical cell bursts. The inhibition of TC cells was presumable mediated by GABAergic RE thalamic neurons. Indeed, simultaneously recorded RE and TC neurons during the cortical SW paroxysm showed that cortical and RE cell excitation was accompanied by corresponding IPSPs in TC cells. Библ. 48

ГРНТИ	34.39.23

ВИНИТИ 341.39.23.25
Рубрики: СОН
ЭЭГ
СИНХРОНИЗИРОВАННЫЕ ПАТТЕРНЫ
КОРА БОЛЬШИХ ПОЛУШАРИЙ
ТАЛАМУС
ВНУТРИКЛЕТОЧНАЯ РЕГИСТРАЦИЯ
ГИПЕРПОЛЯРИЗАЦИЯ
СУДОРОЖНЫЕ СОСТОЯНИЯ
СПАЙК-ВОЛНА
КОШКИ

Доп.точки доступа:
Contreras, D.

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