NMDA receptor-dependent switching between different gamma rhythm-generating microcircuits in entorhinal cortex
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Cites background from "NMDA receptor-dependent switching b..."
...’s study (6) proposes that NMDAR activation could control the nature of the temporal interaction between the EC and the hippocampus by switching from one gamma pattern to another....
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...In the absence of NMDAR-mediated excitation, the spiking activity of basket cells is reduced, releasing goblet cells to interact with principal cells. www.pnas.org cgi doi 10.1073 pnas.0810064105 PNAS November 25, 2008 vol. 105 no. 47 18079–18080 C O M M E N T A R Y a result predicted by modeling work (8–12)....
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...study (6) shows that hippocampal regions in vitro have a selective preference for slow or fast gamma oscillations: whereas the CA1 region preferentially oscillates with 40-Hz oscillations, the CA3 region prefers slower 30-Hz oscillations....
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...in this issue of PNAS (6) provides novel insights into these questions: it identifies 2 subcircuits within the entorhinal cortex (EC) that are capable of generating gamma oscillations at different frequencies....
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...(6) and their differential communication with the CA3 and CA1 regions could support the 2 forms of coding observed....
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14 citations
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...However, NMDAR blockade enhances the ethanol-induced suppression of γ, which may be associated with the contribution of NMDAR to the tonic drive of interneurons (Middleton et al., 2008; Mann and Mody, 2010; Xue et al., 2011)....
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13 citations
Cites background from "NMDA receptor-dependent switching b..."
...In line with this suggestion, both persistent and transient forms of kainate-induced gamma oscillations demonstrate faster gamma frequency oscillations in isolated CA1 area than those in CA3 area (N. Maziashvili and T. Gloveli, unpublished observation, Middleton et al., 2008)....
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References
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"NMDA receptor-dependent switching b..." refers background in this paper
...This mechanism can underlie gamma rhythms in a broad range of frequencies from around 20 Hz up to 70 Hz in the hippocampus (8) but cannot support higher frequencies such as those labeled as ‘‘high gamma’’ previously (9)....
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1,625 citations
"NMDA receptor-dependent switching b..." refers background in this paper
...The basic mechanism of generation of population gamma rhythms by local neuronal circuits reveals an absolute dependence on the influence of fast spiking inhibitory interneurons at the level of principal cell somata (5, 6),with the frequency dependent on the magnitude and kinetics of gamma aminobutyric acid (GABAA) receptor-mediated synaptic events (7)....
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1,529 citations
"NMDA receptor-dependent switching b..." refers background in this paper
...For example, removal of entorhinal cortex in vivo produces a slower gamma rhythm (39), whose origins appear to be in area CA3 (40)....
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985 citations
"NMDA receptor-dependent switching b..." refers background in this paper
...For example, removal of entorhinal cortex in vivo produces a slower gamma rhythm (39), whose origins appear to be in area CA3 (40)....
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899 citations