Cited by 1,678Neural dynamics and brain functionNeuroscience and Neuropharmacology ResearchVisual perception and processing mechanisms

How Inhibition Shapes Cortical Activity

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Isaacson, Jeffry S., Scanziani, Massimo·2011·Neuron

Abstract

Cortical processing reflects the interplay of synaptic excitation and synaptic inhibition. Rapidly accumulating evidence is highlighting the crucial role of inhibition in shaping spontaneous and sensory-evoked cortical activity and thus underscores how a better knowledge of inhibitory circuits is necessary for our understanding of cortical function. We discuss current views of how inhibition regulates the function of cortical neurons and point to a number of important open questions.

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Crossref · 10.1016/j.neuron.2011.09.027

Cites

126 of 126 references verified0 citation errors · 0 not checkable

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  • The prevalence of inhibitory interneurons creates winner-take-all dynamics and competitive inhibition that force categorical rather than probabilistic representations.

    “Furthermore, the prevalence of inhibitory interneurons creates winner-take-all dynamics and competitive inhibition that force categorical rather than probabilistic representations—a pattern seen in the sharp tuning curves and bistable activity patterns observed across cortical regions (Buzsáki 2006; Isaacson and Scanziani 2011).”

    From The myth of the Bayesian brain (2025) · cites this paper as Isaacson and Scanziani 2011

    The “Building blocks” section (page unavailable) describes cortical inhibitory interneurons and their widespread connections, and “Inhibition sharpens tuning” (page unavailable) explains how inhibition can sharpen stimulus tuning. The paper does not say these circuits create winner-take-all dynamics or force categorical rather than probabilistic representations. Its “Inhibition, Gain Control and Dynamic Range” section instead says inhibition can make population recruitment more progressive across a wider range of inputs. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Sharp tuning curves and bistable activity patterns are observed across cortical regions.

    “a pattern seen in the sharp tuning curves and bistable activity patterns observed across cortical regions (Buzsáki 2006; Isaacson and Scanziani 2011).”

    From The myth of the Bayesian brain (2025) · cites this paper as Isaacson and Scanziani 2011

  • Glutamatergic and GABAergic dysfunction in the PFC and ACC has been extensively implicated in both MDD and TRD.

    “Glutamatergic and GABAergic dysfunction in the prefrontal cortex (PFC) and anterior cingulate cortex (ACC) has been extensively implicated in both MDD and TRD [16,17,18,19,20,21,22,23,24,25].”
  • An imbalance between L-glutamate and γ-aminobutyric acid (GABA) has a key role in the pathophysiology of TRD.

    “An imbalance between two primary central nervous system (CNS) neurotransmitters, L-glutamate and γ-aminobutyric acid (GABA), has emerged as having a key role in the pathophysiology of TRD.”
  • Perisomatic inhibition efficiently controls Na+-dependent action potential generation, whereas dendritic inhibition influences local voltage-gated conductances, shunts excitatory inputs lying distal to their location, and regulates the generation of Ca2+-dependent action potentials and synaptic plasticity.

    “Perisomatic inhibition efficiently controls Na+-dependent action potential generation, whereas dendritic inhibition influences local voltage-gated conductances, shunts excitatory inputs lying distal to their location, and regulates the generation of Ca2+-dependent action potentials and synaptic plasticity (522, 790, 721).”

    From Hippocampal GABAergic Inhibitory Interneurons (2017) · cites this paper as [522]

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Research works printed but not linked: 4

  1. Eccles JC The understanding of the brain 1977 2nd edn New York McGraw-Hill
  2. Freund TF Buzsaki G Interneurons of the hippocampus Hippocampus 1996 6 347 470 8915675
  3. Monier C Chavane F Baudot P Graham LJ Fregnac Y Orientation and direction selectivity of synaptic inputs in visual cortical neurons: a diversity of combinations produces spike tuning Neuron 2003 37 663 680 12597863
  4. Somogyi P Tamas G Lujan R Buhl EH Salient features of synaptic organisation in the cerebral cortex Brain Res Brain Res Rev 1998 26 113 135 9651498

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Authors
Isaacson, J. S., & Scanziani, M.
Affiliations
  • University of California San Diego (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
  • Isaacson, Jeffry S.
  • Scanziani, Massimo
Venue
Neuron
Publisher
Elsevier BV
Published
2011-10
Volume
72
Issue
2
Pages
231-243
ISSN
0896-6273 (ISSN-L)
OpenAlex
W1997953085
Cited by
1,678
References
126
Citations by year
2026: 114 · 2025: 143 · 2024: 131 · 2023: 110 · 2022: 117 · 2021: 142 · 2020: 126 · 2019: 128 · 2018: 132 · 2017: 112 · 2016: 119 · 2015: 89 · 2014: 93 · 2013: 73 · 2012: 46
FWCI
5.83
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institute on Deafness and Other Communication Disorders (R01DC004682, R01 DC04682)
  • National Institute of Neurological Disorders and Stroke (NS069010, RC1NS069010)
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 › Visual perception and processing mechanisms
Keywords
cortical inhibition, synaptic inhibition, excitation-inhibition balance, inhibitory circuits, spontaneous cortical activity, sensory-evoked activity, cortical neurons, cortical function
MeSH terms
Animals, Cerebral Cortex, Membrane Potentials, Nerve Net, Neural Inhibition, Synaptic Transmission, Neurons

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