Cited by 1,012Neural dynamics and brain functionNeuroscience and Neuropharmacology ResearchMemory and Neural Mechanisms

Gain Modulation from Background Synaptic Input

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Chance, Frances S, Abbott, L.F, Reyes, Alex D·2002·Neuron

Abstract

Gain modulation is a prominent feature of neuronal activity recorded in behaving animals, but the mechanism by which it occurs is unknown. By introducing a barrage of excitatory and inhibitory synaptic conductances that mimics conditions encountered in vivo into pyramidal neurons in slices of rat somatosensory cortex, we show that the gain of a neuronal response to excitatory drive can be modulated by varying the level of "background" synaptic input. Simultaneously increasing both excitatory and inhibitory background firing rates in a balanced manner results in a divisive gain modulation of the neuronal response without appreciable signal-independent increases in firing rate or spike-train variability. These results suggest that, within active cortical circuits, the overall level of synaptic input to a neuron acts as a gain control signal that modulates responsiveness to excitatory drive.

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Crossref · 10.1016/s0896-6273(02)00820-6

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  • Changes in the level of synaptically driven fluctuations in membrane potential may regulate the gain of the I/O curve for individual neurons.

    “Changes in the level of synaptically driven fluctuations in Vm (also called synaptic fluctuations or synaptic noise) may regulate the gain of the I/O curve for individual neurons57–60 (but see REF.61).”

    From Mechanisms underlying gain modulation in the cortex (2020) · cites this paper as [57]

  • Under conditions of a tight balance between excitatory and inhibitory input, synaptically driven Vm fluctuations alone can produce gain control.

    “Under conditions of a tight balance between excitatory and inhibitory input, synaptically driven Vm fluctuations alone can produce gain control57, and this interaction is stable even across conditions in which synaptic inputs have different temporal statistics62.”

    From Mechanisms underlying gain modulation in the cortex (2020) · cites this paper as [57]

  • Unlike synaptically driven Vm fluctuations, changes in membrane conductance and depolarization cause lateral, or additive, shifts in the I/O transfer function of a neuron without changes in neuronal gain.

    “Unlike synaptically driven Vm fluctuations, changes in membrane conductance and depolarization cause lateral, or additive, shifts in the I/O transfer function of a neuron without changes in neuronal gain57,58,60,61,83,84.”

    From Mechanisms underlying gain modulation in the cortex (2020) · cites this paper as [57]

  • Temporally coincident changes in conductance state and synaptic fluctuations exert a powerful effect on neuronal gain at the single-cell level.

    “Together, temporally coincident changes in conductance state and synaptic fluctuations exert a powerful effect on neuronal gain at the single-cell level57,58,60,61,83,84.”

    From Mechanisms underlying gain modulation in the cortex (2020) · cites this paper as [57]

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Authors
Chance, F. S., Abbott, L. F., & Reyes, A. D.
Affiliations
  • New York University (US)
  • Brandeis University (US)
Corresponding author
Chance, Frances S
Venue
Neuron
Publisher
Elsevier BV
Published
2002-08
Volume
35
Issue
4
Pages
773-782
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2125733184
Cited by
1,012
References
53
Citations by year
2026: 28 · 2025: 25 · 2024: 29 · 2023: 24 · 2022: 25 · 2021: 46 · 2020: 25 · 2019: 52 · 2018: 41 · 2017: 33 · 2016: 41 · 2015: 38 · 2014: 45 · 2013: 50 · 2012: 47
FWCI
26.14
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Eye Institute (T32EY007136)
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
gain modulation, pyramidal neurons, somatosensory cortex, cortical circuits, spike train variability, firing rate
MeSH terms
Action Potentials, Animals, Electric Stimulation, Models, Neurological, Neural Inhibition, Neural Pathways, Synaptic Transmission, Neurons, Organ Culture Techniques, Somatosensory Cortex, Synapses, Genetic Variation, Artifacts, Rats

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