. En-revanche and . De-nombreusesétudesnombreusesétudes-théoriques, et numériques) ont montré que la synchronisationémergesynchronisationémerge naturellemment de réseaux de neurones impulsionnels interconnectés Ainsi des connexions synaptiques entre des intègre-et-tire engendre une synchronisation (locale) lorsqu'ils déchargentdéchargentà la même fréquence [140, 204]. De plus, un réseau d'intègre-et-tire connectés localement par des synapses excitatricesévolueexcitatricesévolue vers une activité oscillatoire localement synchronisée

. Synchronisation-par-un-réseau-d, interneurones Enfin, il appara??tappara??t que la synchronisation peutêtrepeutêtre provoquée par un réseau d'interneurones inhibiteurs connectés mutuellement par des synapsesélectriques synapsesélectriques [77] (dites aussi gap junction). L'activité de ce réseau peut-? etre oscillatoire

D. Ainsi and . Le-système-olfactif, la présentation d'une odeurfamilì ere induit des réponses synchronisées [129] dûesdûesà des oscillations provoquées par un réseau d'interneurones inhibiteurs

. Dans-le-cortex-du-rat, les interneurones inhibiteurs dits fast-spiking (FS) (fréquence de déchargé elévée, et déchargerégulì ere, sans adaptation), qui sont fortement stimulés par les axones thalamocorticaux, sont connectés mutuellement par des synapsesélectriquessynapsesélectriques et, dans une moindre mesure, par des synapses chimiques, Cette connectivité induit in vitro des réponses synchroniséessynchroniséesà la milliseconde. La synchronisation dans ce type de réseau d'interneurones estégalementestégalement observée in vivo

. Un-autre-réseau-d, interneurones inhibiteurs corticaux, dits low-thresholdspiking (LTS), ´ egalement localement couplés par des synapsesélectriquessynapsesélectriques, mais non stimulés par le thalamus, montre lorsqu'il est stimulé une activité synchrone, rhythmique ou apériodique, echelle de la milliseconde, qui est répercutée sur les neurones environnants, excitateurs ou inhibiteurs (FS)

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