Cited by 612Visual perception and processing mechanismsNeuroscience and Neuropharmacology ResearchNeural dynamics and brain function

Parvalbumin-expressing interneurons linearly transform cortical responses to visual stimuli

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Atallah, Bassam V., Bruns, William, Carandini, Matteo, Scanziani, Massimo·2012·Neuron

Abstract

The response of cortical neurons to a sensory stimulus is shaped by the network in which they are embedded. Here we establish a role of parvalbumin (PV)-expressing cells, a large class of inhibitory neurons that target the soma and perisomatic compartments of pyramidal cells, in controlling cortical responses. By bidirectionally manipulating PV cell activity in visual cortex we show that these neurons strongly modulate layer 2/3 pyramidal cell spiking responses to visual stimuli while only modestly affecting their tuning properties. PV cells' impact on pyramidal cells is captured by a linear transformation, both additive and multiplicative, with a threshold. These results indicate that PV cells are ideally suited to modulate cortical gain and establish a causal relationship between a select neuron type and specific computations performed by the cortex during sensory processing.

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Crossref · 10.1016/j.neuron.2011.12.013

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  • In mouse visual cortex, fast-spiking neurons are more broadly selective for orientation, direction and spatial frequency than pyramidal cells.

    “in mouse visual cortex, selectivity to visual stimuli such as orientation, direction, and spatial frequency are broader for FS neurons than for pyramidal cells”

    From GABAergic Interneurons in the Neocortex: From Cellular Properties to Circuits (2016) · cites this paper as Atallah et al., 2012

    The Results section, “Visual Responses of PV Cells Are Distinct from Those of Pyr Cells” (page unavailable), reports that PV cells—identified there as fast-spiking—were less orientation-selective and more broadly orientation-tuned than pyramidal cells. The paper discusses direction selectivity when PV-cell activity is perturbed, but does not establish that PV cells are more broadly direction-selective than pyramidal cells. The Visual Stimulation methods (page unavailable) say spatial frequency was set to each cell’s preference; they do not report the claimed comparison in spatial-frequency selectivity. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Cortical interneurons are generally more broadly tuned than nearby principal cells, but different interneuron types show varying degrees of sensory tuning.

    “It appears that for the most part cortical INs are more broadly tuned than nearby PCs, yet different INs show various degrees of sensory tuning.”

    From GABAergic Interneurons in the Neocortex: From Cellular Properties to Circuits (2016) · cites this paper as Atallah et al., 2012

    The Results section, “Visual Responses of PV Cells Are Distinct from Those of Pyr Cells,” reports that parvalbumin-expressing interneurons were more broadly tuned to visual-stimulus orientation than pyramidal cells. But the paper studies this one interneuron class; its Discussion calls for future comparisons with other classes rather than establishing that different interneuron types have varying degrees of sensory tuning. The claim also generalizes the PV-cell finding to cortical interneurons overall. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Results from optogenetic studies disagree about the specific role of each interneuron group in tuning.

    “However, the results from these studies do not agree on the specific role of each interneuron group.”

    From GABAergic Interneurons in the Neocortex: From Cellular Properties to Circuits (2016) · cites this paper as Atallah et al., 2012

    The Introduction says the specific roles of distinct inhibitory-neuron types in sensory processing were unknown. The Results also contrast this paper’s findings on PV-cell visual responses with a previous report. Neither passage establishes that optogenetic studies disagree about the role of each interneuron group in tuning; this study directly tests PV cells, not each group. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • PV and Sst inhibitory neurons play distinct roles in tuning excitatory neurons, producing either divisive or subtractive inhibition.

    “These studies demonstrated that PV and Sst inhibitory neurons play distinct roles in the tuning of excitatory neurons producing either divisive or subtractive inhibition.”

    From GABAergic Interneurons in the Neocortex: From Cellular Properties to Circuits (2016) · cites this paper as Atallah et al., 2012

    The Results section, “A Linear Function Describes How PV Cells Control Pyr Cell Visual Responses” (page unavailable), reports that activating PV cells both multiplied pyramidal-cell responses by 0.7 and subtracted a constant amount. The paper studies PV cells, not Sst cells; its Discussion calls comparisons with other inhibitory cell types a subject for future work. It therefore does not establish distinct PV and Sst roles or assign divisive versus subtractive inhibition to the two types. (LLM, conf=0.89)

    Experimental — accuracy not yet measured
  • Some studies found that Sst interneurons sharpen orientation tuning, while activating PV interneurons has a minor effect on tuning but changes response gain.

    “Some studies found that Sst INs sharpen orientation tuning (Wilson et al., 2012), while activation of PV INs was found to have a minor effect on tuning but changed response gain”

    From GABAergic Interneurons in the Neocortex: From Cellular Properties to Circuits (2016) · cites this paper as Atallah et al., 2012

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Authors
Atallah, B. V., Bruns, W., Carandini, M., & Scanziani, M.
Affiliations
  • University of California San Diego (US)
  • Howard Hughes Medical Institute (US)
  • University College London (GB)
Corresponding author
  • Atallah, Bassam V.
  • Scanziani, Massimo
Venue
Neuron
Publisher
Elsevier BV
Published
2012-01
Volume
73
Issue
1
Pages
159-170
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2009759904
Cited by
612
References
52
Citations by year
2026: 23 · 2025: 43 · 2024: 39 · 2023: 31 · 2022: 46 · 2021: 46 · 2020: 62 · 2019: 36 · 2018: 43 · 2017: 44 · 2016: 45 · 2015: 36 · 2014: 46 · 2013: 49 · 2012: 22
FWCI
24.74
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • Gatsby Charitable Foundation
  • National Institutes of Health (NS061521)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
parvalbumin interneurons, inhibitory interneurons, visual cortex, layer 2/3 pyramidal cells, linear operators, perisomatic inhibition, sensory processing
MeSH terms
Channelrhodopsins, Action Potentials, Animals, Animals, Newborn, Evoked Potentials, Visual, Interneurons, Light, Mice, Transgenic, Models, Neurological, Orientation, Parvalbumins, Photic Stimulation, Transduction, Genetic, Visual Cortex, Visual Pathways, Linear Models, Pyramidal Cells, Patch-Clamp Techniques, Mice

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