Cited by 1,215Neural dynamics and brain functionNeuroscience and Neuropharmacology ResearchMemory and Neural Mechanisms

The neocortical circuit: themes and variations

Open access
Harris, Kenneth D, Shepherd, Gordon M G·2015·Nature Neuroscience

Abstract

Similarities in neocortical circuit organization across areas and species suggest a common strategy to process diverse types of information, including sensation from diverse modalities, motor control and higher cognitive processes. Cortical neurons belong to a small number of main classes. The properties of these classes, including their local and long-range connectivity, developmental history, gene expression, intrinsic physiology and in vivo activity patterns, are remarkably similar across areas. Each class contains subclasses; for a rapidly growing number of these, conserved patterns of input and output connections are also becoming evident. The ensemble of circuit connections constitutes a basic circuit pattern that appears to be repeated across neocortical areas, with area- and species-specific modifications. Such 'serially homologous' organization may adapt individual neocortical regions to the type of information each must process.

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Crossref · 10.1038/nn.3917

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150 of 150 references verified0 citation errors · 0 not checkable

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  • The brain exhibits extreme anatomical specialization with distinct cell types, circuit motifs, and processing principles across regions.

    “The brain exhibits extreme anatomical specialization with distinct cell types, circuit motifs, and processing principles across regions—from the unique neuronal types of the cerebellum to the columnar organization of sensory cortices to the distinct microcircuits of the basal ganglia (Harris and Shepherd 2015; Nelken 2004).”

    From The myth of the Bayesian brain (2025) · cites this paper as Harris and Shepherd 2015

    The Abstract and Introduction describe area-specific modifications and functional specialization within the neocortex. But they emphasize shared cell classes and a common circuit pattern across cortical areas, rather than extreme anatomical specialization or distinct processing principles. The cited passages do not establish the sentence’s examples concerning the cerebellum or basal ganglia (page numbers unavailable). (LLM, conf=0.86)

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  • Layer marker distributions within AARs agreed with known biology of cortical layers.

    “we found that layer marker distributions within our AARs agreed with the biology described in the literature,11,48”
  • Cortical neurons exhibit extreme diversity in gene expression as well as in morphological and electrophysiological properties.

    “Cortical neurons exhibit extreme diversity in gene expression as well as in morphological and electrophysiological properties1,2.”
  • Glutamatergic neuronal types are organized by layers and their long-range projection patterns.

    “Glutamatergic neuronal types are organized by layers and their long-range projection patterns”

    From A taxonomy of transcriptomic cell types across the isocortex and hippocampal formation (2021) · cites this paper as Harris and Shepherd, 2015

  • L4 IT CTX Rspo1 likely represents L4 spiny stellate or star pyramid neurons that are morphologically distinct from pyramidal neurons in other layers.

    “This supertype likely represents the L4 spiny stellate or star pyramid neurons that are morphologically distinct from the pyramidal neurons in other layers (Harris and Shepherd, 2015)”

    From A taxonomy of transcriptomic cell types across the isocortex and hippocampal formation (2021) · cites this paper as Harris and Shepherd, 2015

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Research works printed but not linked: 5

  1. [14]von Economo C The Cytoarchitectonics of the Human Cerebral Cortex Oxford University Press London 1929
  2. [20]Lorente de No R Cerebral Cortex: Architecture, Intracortical Connections, Motor Projections Physiology of the Nervous System 3 Fulton JF 288 330 Oxford University Press London 1949
  3. [21]Evarts EV Shinoda Y Wise SP Neurophysiological approaches to higher brain functions John Wiley & Sons New York 1984
  4. [32]Hooks BM Laminar organization of long-range excitatory input to mouse motor cortex Journal of Neuroscience 33 748 760 2013 23303952 PMC3710148
  5. [115]Zhou M Scaling down of balanced excitation and inhibition by active behavioral states in auditory cortex Nature neuroscience 2014 PMC4108079 24747575

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Authors
Harris, K. D., & Shepherd, G. M. G.
Affiliations
  • UCL Queen Square Institute of Neurology (GB)
  • Northwestern University (US)
Corresponding author
  • Harris, Kenneth D
  • Shepherd, Gordon M G
Venue
Nature Neuroscience
Published
2015-01-27
Volume
18
Issue
2
Pages
170-181
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2040868835
Cited by
1,215
References
150
Citations by year
2026: 127 · 2025: 157 · 2024: 117 · 2023: 147 · 2022: 108 · 2021: 103 · 2020: 99 · 2019: 104 · 2018: 79 · 2017: 89 · 2016: 56 · 2015: 28 · 2014: 1
FWCI
8.26
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • Wellcome Trust (095668)
  • Engineering and Physical Sciences Research Council (EP/I005102/1, EP/I005102/2, EP/K015141/1)
  • National Institute on Deafness and Other Communication Disorders (R56DC013272, DC013272)
  • National Institute of Neurological Disorders and Stroke (NS061963, R01NS061963, NS087479, R21NS087479, R37NS061963)
  • National Institute of Biomedical Imaging and Bioengineering (U01EB017695, EB017695)
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
neocortical circuits, cortical connectivity, species-specific variation, cortical neurons, long-range connectivity, local connectivity, gene expression, in vivo neuronal activity, sensory processing, motor control, higher cognition
MeSH terms
Animals, Humans, Interneurons, Nerve Net, Neocortex

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