Cited by 92Pain Mechanisms and TreatmentsNeuroscience and Neuropharmacology ResearchIon Channels and Receptors

A Functional Topographic Map for Spinal Sensorimotor Reflexes

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Gatto, Graziana, Bourane, Steeve, Ren, Xiangyu, Di Costanzo, Stefania, Fenton, Peter K., Halder, Priyabrata, Seal, Rebecca P., Goulding, Martyn D.·2021·Neuron

Abstract

Cutaneous somatosensory modalities play pivotal roles in generating a wide range of sensorimotor behaviors, including protective and corrective reflexes that dynamically adapt ongoing movement and posture. How interneurons (INs) in the dorsal horn encode these modalities and transform them into stimulus-appropriate motor behaviors is not known. Here, we use an intersectional genetic approach to functionally assess the contribution that eight classes of dorsal excitatory INs make to sensorimotor reflex responses. We demonstrate that the dorsal horn is organized into spatially restricted excitatory modules composed of molecularly heterogeneous cell types. Laminae I/II INs drive chemical itch-induced scratching, laminae II/III INs generate paw withdrawal movements, and laminae III/IV INs modulate dynamic corrective reflexes. These data reveal a key principle in spinal somatosensory processing, namely, sensorimotor reflexes are driven by the differential spatial recruitment of excitatory neurons.

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Crossref · 10.1016/j.neuron.2020.10.003

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  • The Prkcg dorsal excitatory family comprised Excit-3 and Excit-4 and likely corresponded to neurons involved in light static touch and allodynic pain in pathological situations.

    “The Prkcg dorsal, excitatory family was comprised of Excit-3 and Excit-4 and likely corresponded to neurons involved in light static touch and allodynic pain in pathological situations46,48–56.”
  • The Maf dorsal excitatory family comprised Excit-5, Excit-6, and Excit-7, which expressed markers of neurons involved in light touch.

    “The Maf dorsal, the excitatory family was comprised of Excit-5, Excit-6, and Excit-7 which expressed markers of neurons involved in light touch46,48,50,56,57.”
  • The Sox5 dorsal excitatory family comprised Excit-14, Excit-15, Excit-16, Excit-17, Excit-18, and Excit-19 and expressed markers suggestive of a role in coping pain and mechanical nociception.

    “The Sox5 dorsal, the excitatory family was comprised of Excit-14, Excit-15, Excit-16, Excit-17, Excit-18, and Excit-19, and expressed markers suggestive of a role in coping pain and mechanical nociception46,52,56,63–67.”
  • The Cpne4 dorsal excitatory family had markers of interneurons suggested to be involved in mechanical itch.

    “This family had markers of interneurons suggested to be involved in mechanical itch46,47.”

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Authors
Gatto, G., Bourane, S., Ren, X., Di Costanzo, S., Fenton, P. K., Halder, P., Seal, R. P., & Goulding, M. D.
Affiliations
  • Salk Institute for Biological Studies (US)
  • University of Pittsburgh (US)
Corresponding author
Goulding, Martyn D.
Venue
Neuron
Publisher
Elsevier BV
Published
2021-01
Volume
109
Issue
1
Pages
91-104.e5
ISSN
0896-6273 (ISSN-L)
OpenAlex
W3106145129
Cited by
92
References
83
Citations by year
2026: 17 · 2025: 21 · 2024: 10 · 2023: 9 · 2022: 15 · 2021: 19 · 2020: 1
FWCI
6.61
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • HAL (submittedVersion)
Funders
  • National Institute of Neurological Disorders and Stroke
  • European Molecular Biology Organization
Topics
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
Keywords
dorsal horn, sensorimotor reflexes, excitatory interneurons, somatosensory processing, functional topography
MeSH terms
Animals, Female, Male, Mice, Transgenic, Pain Measurement, Physical Stimulation, Psychomotor Performance, Reflex, Spinal Cord, Mice

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