A neocortical delta rhythm facilitates reciprocal interlaminar interactions via nested theta rhythms
作者： L. M. Carracedo , H. Kjeldsen , L. Cunnington , A. Jenkins , I. Schofield
DOI: 10.1523/JNEUROSCI.0735-13.2013
关键词:
摘要: Delta oscillations (1–4 Hz) associate with deep sleep and are implicated in memory consolidation replay of cortical responses elicited during wake states. A potent local generator has been characterized thalamus, generators neocortex have suggested. Here we demonstrate that isolated rat generates delta rhythms conditions mimicking the neuromodulatory state (low cholinergic dopaminergic tone). The rhythm originated an NMDA receptor-driven network intrinsic bursting (IB) neurons layer 5, activating a source GABAB receptor-mediated inhibition. In contrast, regular spiking (RS) 5 generated theta-frequency outputs. 2/3 principal cells, outputs from IB cells associated IPSPs, whereas those RS related to nested bursts EPSPs. Both interlaminar spike field correlations revealed sequence events whereby sparse was partially reflected back on each period. We suggest these reciprocal, interactions may represent “Helmholtz machine”-like process control synaptic rescaling sleep.
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