Reconciling the functions of even-skipped interneurons during crawling, swimming, and walking
Open accessAbstract
In all bilaterally symmetric animals, movements across the body are coordinated by interneurons that traverse the midline. Recent work is beginning to tease apart the functional complexity of interneurons labeled by the homeodomain transcription factor even-skipped, which provide a phylogenetically-conserved source of commissural excitation during locomotion in both vertebrates and invertebrates. Here we review recent studies of the roles of even-skipped neurons during locomotion in flies (EL neurons), fishes, frogs, and mice (V0v neurons). Comparisons across species reveal commonalities, which include the functional organization of even-skipped circuits based on birth order, the link between increased muscular complexity and even-skipped neuron diversity, and the hierarchical organization of even-skipped circuits based on their control of escape versus exploratory movements. We discuss how stronger links between different species enable testable predictions to further the discovery of principles of locomotor network organization.
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Different subgroups of V0v neurons are probably involved in coiling versus swimming.
“While V0v neurons are the likely candidate to mediate the activation of contralateral movements, different subgroups of V0v neurons are probably involved in coiling versus swimming (Björnfors and El Manira, 2016; Jay and McLean, 2019) considering the two different targets of contralateral excitation involved, namely ICs in coiling and V2as in swimming.”
From Modeling spinal locomotor circuits for movements in developing zebrafish (2021) · cites this paper as Jay and McLean, 2019
The ‘Even-skipped interneurons and swimming’ section describes early-born ascending V0v neurons recruited during spontaneous whole-body bends and later-born MCoDs participating in exploratory swimming. This supports the idea that different V0v subgroups serve different movements, but the paper does not explicitly identify those bends as coiling or establish the proposed IC-versus-V2a targets. Page numbers are unavailable in our copy. (LLM, conf=0.82)
Experimental — accuracy not yet measuredV0v neurons are a population of glutamatergic commissural INs, some of which may be involved in larger amplitude locomotor movements such as coiling.
“V0v neurons are a population of glutamatergic commissural INs, some of which may be involved in larger amplitude locomotor movements such as coiling (Jay and McLean, 2019).”
From Modeling spinal locomotor circuits for movements in developing zebrafish (2021) · cites this paper as Jay and McLean, 2019
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Cites
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Sorted by citations
Modeling spinal locomotor circuits for movements in developing zebrafish
Roussel, Y., Gaudreau, S. F., Kacer, E. R., Sengupta, M., & Bui, T. V. (2021) · eLife · doi:10.7554/elife.67453 · Cited by 39 · see citing works
- Authors
- Jay, M., & McLean, D. L.
- Affiliations
- Northwestern University (US)
- Corresponding author
- McLean, David L
- ORCID
- McLean, David L
- Venue
- Current Opinion in Physiology
- Publisher
- Elsevier BV
- Published
- 2019-04
- Volume
- 8
- Pages
- 188-192
- ISSN
- 2468-8673 (ISSN-L)
- PMC
- PMC6820970
- OpenAlex
- W2918921409
- Cited by
- 8
- References
- 4
- Citations by year
- 2026: 1 · 2024: 2 · 2022: 2 · 2021: 1 · 2020: 2
- FWCI
- 0.17
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Current Opinion in Physiology (acceptedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health (R01-NS067299)
- National Science Foundation (IOS-1456830)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Keywords
- commissural interneurons, locomotor circuits, crawling, swimming, walking, birth order, escape behavior, exploratory behavior, Drosophila, zebrafish, frogs, mice, interneuron diversity
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