Cited by 721Neural dynamics and brain functionMemory and Neural MechanismsNeuroscience and Neuropharmacology Research

Theta oscillations provide temporal windows for local circuit computation in the entorhinal-hippocampal loop

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Mizuseki, Kenji, Sirota, Anton, Pastalkova, Eva, Buzsáki, György·2009·Neuron

Abstract

Theta oscillations are believed to play an important role in the coordination of neuronal firing in the entorhinal (EC)-hippocampal system but the underlying mechanisms are not known. We simultaneously recorded from neurons in multiple regions of the EC-hippocampal loop and examined their temporal relationships. Theta-coordinated synchronous spiking of EC neuronal populations predicted the timing of current sinks in target layers in the hippocampus. However, the temporal delays between population activities in successive anatomical stages were longer (typically by a half theta cycle) than expected from axon conduction velocities and passive synaptic integration of feed-forward excitatory inputs. We hypothesize that the temporal windows set by the theta cycles allow for local circuit interactions and thus a considerable degree of computational independence in subdivisions of the EC-hippocampal loop.

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Crossref · 10.1016/j.neuron.2009.08.037

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  • About 250,000 principal cells from ipsilateral ECIII synapse onto the CA1 region, and approximately 2% of these cells are active per theta cycle at a low firing rate, so ECIII cells could provide 5000 input spikes to ipsilateral CA1.

    “About 250,000 principal cells from ipsilateral ECIII synapse onto the CA1 region (Andersen et al., 2006), and approximately 2% of these cells are active per theta cycle at a low firing rate (Csicsvari et al., 1999; Mizuseki et al., 2009). Therefore, ECIII cells could provide 5000 input spikes to ipsilateral CA1 (Equation 3).”

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  1. Tsodyks MV Skaggs WE Sejnowski TJ McNaughton BL 1996 Population dynamics and theta rhythm phase precession of hippocampal place cell firing: a spiking neuron model Hippocampus 6 271 280 8841826

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Authors
Mizuseki, K., Sirota, A., Pastalkova, E., & Buzsáki, G.
Affiliations
Rutgers, The State University of New Jersey (US)
Corresponding author
Buzsáki, György
Venue
Neuron
Publisher
Elsevier BV
Published
2009-10
Volume
64
Issue
2
Pages
267-280
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2141964964
Cited by
718
References
109
Citations by year
2026: 20 · 2025: 39 · 2024: 42 · 2023: 64 · 2022: 38 · 2021: 48 · 2020: 43 · 2019: 56 · 2018: 59 · 2017: 47 · 2016: 53 · 2015: 44 · 2014: 44 · 2013: 44 · 2012: 36
FWCI
11.94
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • James S. McDonnell Foundation
  • Robert E. Leet and Clara Guthrie Patterson Trust
  • National Science Foundation (SBE 0542013)
  • Uehara Memorial Foundation
  • Japan Society for the Promotion of Science
  • Astellas Foundation for Research on Metabolic Disorders
  • National Institutes of Health (MH54671, NS034994)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
theta oscillations, entorhinal cortex, hippocampus, neuronal synchronization, current sink, time delay, axonal conduction velocity, synaptic integration
MeSH terms
Action Potentials, Animals, Electric Stimulation, Hippocampus, Male, Models, Neurological, Movement, Nerve Net, Neural Inhibition, Neural Pathways, Synaptic Transmission, Neurons, Reaction Time, Theta Rhythm, Long-Term Potentiation, Patch-Clamp Techniques, Entorhinal Cortex, Rats, Long-Evans, Rats

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