Cited by 962Neural dynamics and brain functionNeuroscience and Neuropharmacology ResearchMemory and Neural Mechanisms

Neocortical Network Activity In Vivo Is Generated through a Dynamic Balance of Excitation and Inhibition

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Haider, Bilal, Duque, Alvaro, Hasenstaub, Andrea R., McCormick, David A.·2006·The Journal of Neuroscience

Abstract

The recurrent excitatory and inhibitory connections between and within layers of the cerebral cortex are fundamental to the operation of local cortical circuits. Models of cortical function often assume that recurrent excitation and inhibition are balanced, and we recently demonstrated that spontaneous network activity in vitro contains a precise balance of excitation and inhibition; however, the existence of a balance between excitation and inhibition in the intact and spontaneously active cerebral cortex has not been directly tested. We examined this hypothesis in the prefrontal cortex in vivo, during the slow (<1 Hz) oscillation in ketamine–xylazine-anesthetized ferrets. We measured persistent network activity (Up states) with extracellular multiple unit and local field potential recording, while simultaneously recording synaptic currents in nearby cells. We determined the reversal potential and conductance change over time during Up states and found that the body of Up state activity exhibited a steady reversal potential (−37 mV on average) for hundreds of milliseconds, even during substantial (21 nS on average) changes in membrane conductance. Furthermore, we found that both the initial and final segments of the Up state were characterized by significantly more depolarized reversal potentials and concomitant increases in excitatory conductance, compared with the stable middle portions of Up states. This ongoing temporal evolution between excitation and inhibition, which exhibits remarkable proportionality within and across neurons in active local networks, may allow for rapid transitions between relatively stable network states, permitting the modulation of neuronal responsiveness in a behaviorally relevant manner.

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Crossref · 10.1523/jneurosci.5297-05.2006

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  • The up-state reflects some balance between excitatory and inhibitory neuronal activity, whereas the hyperpolarizing down-state represents a period of disfacilitation that does not contain active inhibition.

    “Whereas the up-state reflects some balance between excitatory and inhibitory neuronal activity (505, 1017, 1074), the hyperpolarizing down-state represents a period of disfacilitation that does not contain active inhibition (229,1146).”

    From About Sleep's Role in Memory (2013) · cites this paper as [505]

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Authors
Haider, B., Duque, A., Hasenstaub, A. R., & McCormick, D. A.
Affiliations
Yale University (US)
Corresponding author
McCormick, David A.
Venue
The Journal of Neuroscience
Published
2006-04-26
Volume
26
Issue
17
Pages
4535-4545
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2100438317
Cited by
962
References
65
Citations by year
2026: 24 · 2025: 34 · 2024: 34 · 2023: 36 · 2022: 48 · 2021: 46 · 2020: 87 · 2019: 54 · 2018: 35 · 2017: 60 · 2016: 50 · 2015: 54 · 2014: 68 · 2013: 54 · 2012: 45
FWCI
21.50
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • Kavli Foundation
  • Pfizer
  • National Institutes of Health
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
excitation-inhibition balance, prefrontal cortex, slow oscillations, up states, reversal potential, synaptic conductance, spontaneous network activity, ferrets, local field potentials
MeSH terms
Action Potentials, Animals, Biological Clocks, Cells, Cultured, Computer Simulation, Ferrets, Male, Models, Neurological, Nerve Net, Neural Inhibition, Synaptic Transmission, Neurons, Neocortex, Excitatory Postsynaptic Potentials

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