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РЖ ВИНИТИ 34 (BI49) 96.03-04М1.123

Maeda, Eisaku.
The mechanisms of generation and propagation of synchronized bursting in developing networks of cortical neurons [Text] / Eisaku Maeda, Hugh P. C. Robinson, Akio Kawana // J. Neurosci. - 1995. - Vol. 15, N 10. - P6834-6845 . - ISSN 0270-6474
Перевод заглавия: Механизмы генерации и распространения синхронизированных вспышек активности в развивающихся нервных сетях корковых нейронов
Аннотация: The characteristics and mechanisms of synchronized firing in developing networks of cultured cortical neurons were studied using multisite recording through planar electrode arrays (PEAs). With maturation of the network (from 3 to 40 d after plating), the frequency and propagation velocity of bursts increased markedly (approximately from 0.01 to 0.5 Hz and from 5 to 100 mm/sec, respectively), and the sensitivity to extracellular magnesium concentration (0-10 mм) decreased. The source of spontaneous bursts, estimated from the relative delay of onset of activity between electrodes, varied randomly with each burst. Physical separation of synchronously bursting networks into several parts using an ultraviolet laser, divided synchronous bursting into different frequencies and phases in each part. Focal stimulation through the PEA was effective at multiple sites in eliciting bursts, which propagated over the network from the site of stimulation. Stimulated bursts exhibited both an absolute refractory period and a relative refractory period, in which partially propagating bursts could be elicited. Periodic electrical stimulation (at 1 to 30 sec intervals) produced slower propagation velocities and smaller numbers of spikes per burst at shorter stimulation intervals. Библ. 36

ГРНТИ	34.21.17

ВИНИТИ 341.21.17.09.07.15
Рубрики: КОРА БОЛЬШИХ ПОЛУШАРИЙ
КУЛЬТУРА КЛЕТОК
НЕЙРОННЫЕ СЕТИ
СИНХРОНИЗИРОВАННАЯ АКТИВНОСТЬ
РЕФРАКТЕРНОСТЬ
СИНАПТИЧЕСКИЙ НЕЙРОМЕДИАТОР
МНОГОКАНАЛЬНАЯ РЕГИСТРАЦИЯ
КРЫСИНЫЕ ЭМБРИОНЫ

Доп.точки доступа:
Robinson, Hugh P.C.; Kawana, Akio

РЖ ВИНИТИ 34 (BI24) 96.03-04М3.329

Maeda, Eisaku.
The mechanisms of generation and propagation of synchronized bursting in developing networks of cortical neurons [Text] / Eisaku Maeda, Hugh P. C. Robinson, Akio Kawana // J. Neurosci. - 1995. - Vol. 15, N 10. - P6834-6845 . - ISSN 0270-6474
Перевод заглавия: Механизмы генерации и распространения синхронизированных вспышек активности в развивающихся нервных сетях корковых нейронов
Аннотация: The characteristics and mechanisms of synchronized firing in developing networks of cultured cortical neurons were studied using multisite recording through planar electrode arrays (PEAs). With maturation of the network (from 3 to 40 d after plating), the frequency and propagation velocity of bursts increased markedly (approximately from 0.01 to 0.5 Hz and from 5 to 100 mm/sec, respectively), and the sensitivity to extracellular magnesium concentration (0-10 mм) decreased. The source of spontaneous bursts, estimated from the relative delay of onset of activity between electrodes, varied randomly with each burst. Physical separation of synchronously bursting networks into several parts using an ultraviolet laser, divided synchronous bursting into different frequencies and phases in each part. Focal stimulation through the PEA was effective at multiple sites in eliciting bursts, which propagated over the network from the site of stimulation. Stimulated bursts exhibited both an absolute refractory period and a relative refractory period, in which partially propagating bursts could be elicited. Periodic electrical stimulation (at 1 to 30 sec intervals) produced slower propagation velocities and smaller numbers of spikes per burst at shorter stimulation intervals. Библ. 36

ГРНТИ	34.39.17

ВИНИТИ 341.39.17.49.02
Рубрики: КОРА БОЛЬШИХ ПОЛУШАРИЙ
КУЛЬТУРА КЛЕТОК
НЕЙРОННЫЕ СЕТИ
СИНХРОНИЗИРОВАННАЯ АКТИВНОСТЬ
РЕФРАКТЕРНОСТЬ
СИНАПТИЧЕСКИЙ НЕЙРОМЕДИАТОР
МНОГОКАНАЛЬНАЯ РЕГИСТРАЦИЯ
КРЫСИНЫЕ ЭМБРИОНЫ

Доп.точки доступа:
Robinson, Hugh P.C.; Kawana, Akio

РЖ ВИНИТИ 34 (BI24) 97.10-04М3.145

Spontaneous periodic synchronized bursting during formation of mature patterns of connections in cortical cultures [Text] / Hiroyuki Kamioka [et al.] // Neurosci. Lett. - 1996. - Vol. 206, N 2-3. - P109-112 . - ISSN 0304-3940
Перевод заглавия: Спонтанные периодические синхронизированные залпы при формировании зрелых паттернов связей в культуре корковых нейронов
Аннотация: Long-term recording of spontaneous activity in cultured cortical neuronal networks was carried out using substrates containing multi-electrode arrays. Spontaneous uncorrelated firing appeared within the first 3 days and transformed progressively into synchronized bursting within a week. By 30 days from the establishment of the culture, the network exhibited a complicated non-periodic, synchronized activity pattern which showed no changes for more than 2 months and thus represented the mature state of the network. Pharmacological inhibition of activity only during the period when regular synchronized bursting was observed was capable of producing a different mature activity pattern from the control

ГРНТИ	34.39.17

ВИНИТИ 341.39.17.49.21
Рубрики: КОРА БОЛЬШИХ ПОЛУШАРИЙ
КУЛЬТУРА НЕЙРОНОВ
НЕЙРОННАЯ АКТИВНОСТЬ
ОНТОГЕНЕЗ
ОБРАЗОВАНИЕ СИНАПСОВ
ХРОНИЧЕСКОЕ ТОРМОЖЕНИЕ
ТЕТРОДОТОКСИН
КРЫСЫ

Доп.точки доступа:
Kamioka, Hiroyuki; Maeda, Eisaku; Jimbo, Yasuhiko; Robinson, Hugh P.C.; Kawana, Akio

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