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РЖ ВИНИТИ 34 (BI24) 95.12-04М3.246

Contreras, D.
Cellular basis of EEG slow rhythms: A study of dynamic corticothalamic relationship [Text] / D. Contreras, M. Steriade // J. Neurosci. - 1995. - Vol. 15, N 1. - P604-621 . - ISSN 0270-6474
Перевод заглавия: Клеточные основы медленных ритмов ЭЭГ: изучение динамических кортикоталамических взаимосвязей
Аннотация: The aim of the present study was to determine the phase relations between cortical and thalamic neuronal activities during the slow EEG oscillation. Intracellular recordings were performed in anesthetized cats from neurons in motor and somatosensory cortical areas, the rostrolateral sector of the reficular (RE) thalamic nucleus, and thalamocortical (TC) cells from ventrolateral (VL) nucleus. The EEG was used as time reference for alignment of activities in different, simultaneously recorded neurons, including dual impalements of cortical cells as well as cortical and TC cells. The spontaneous EEG oscillation was characterized by slowly recurring (0.3-0.9 Hz) sequences of surface-positive (depth-negative) sharp deflections, often followed by oscillatory activity within the frequency range of sleep spindles (7-14 Hz) or at faster frequencies. Cortical ans RE cells were similarly hyperpolarized during the depth-positive EEG waves and were depolarized during the depth-negative EEG deflections. In many instances, the cell depolarization was associated with oscillations at the spindle frequency or with tonic firing at rates related to the level of depolarization. TC neurons were hyperpolarized during the depth-positive EEG waves and displayed a series of IPSPs, at the spindle frequencies, during the depth-negative EEG waves. Depending on the membrane potential (V[m]), TC cells could fire spike bursts at the onset of the EEG depth-negativity, or their firing could be delayed by subsequent IPSPs. The sequence of spontaneous EEG and cellular events described above also characterized the responses to cortical and thalamic stimulation. Simultaneous intracellular recordings of pairs of cortical cells of cortical and TC cells showed that spontaneous transitions from less synchronized to more synchronized EEG states were marked by a sumultaneous hyperpolarization, coincident with an over depth-positive EEG wave. Библ. 58

ГРНТИ	34.39.17

ВИНИТИ 341.39.17.49.09
Рубрики: ЭЭГ
МЕДЛЕННЫЕ КОЛЕБАНИЯ
ВЕРЕТЕНА
КОРА БОЛЬШИХ ПОЛУШАРИЙ
РЕТИКУЛЯРНЫЙ ТАЛАМУС
ТАЛАМОКОРКОВЫЕ ВЗАИМОСВЯЗИ
ТОРМОЖЕНИЕ
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Доп.точки доступа:
Steriade, M.

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