PUBLICATION
Regulation of locomotor speed and selection of active sets of neurons by V1 neurons
- Authors
- Kimura, Y., Higashijima, S.I.
- ID
- ZDB-PUB-190524-4
- Date
- 2019
- Source
- Nature communications 10: 2268 (Journal)
- Registered Authors
- Higashijima, Shin-ichi
- Keywords
- none
- MeSH Terms
-
- Animals
- Animals, Genetically Modified
- Anterior Horn Cells/physiology*
- Embryo, Nonmammalian
- Larva
- Models, Animal
- Renshaw Cells/physiology*
- Swimming/physiology*
- Zebrafish
- PubMed
- 31118414 Full text @ Nat. Commun.
Citation
Kimura, Y., Higashijima, S.I. (2019) Regulation of locomotor speed and selection of active sets of neurons by V1 neurons. Nature communications. 10:2268.
Abstract
During fast movements in vertebrates, slow motor units are thought to be deactivated due to the mechanical demands of muscle contraction, but the associated neuronal mechanisms for this are unknown. Here, we perform functional analyses of spinal V1 neurons by selectively killing them in larval zebrafish, revealing two functions of V1 neurons. The first is the long-proposed role of V1 neurons: they play an important role in shortening the cycle period during swimming by providing in-phase inhibition. The second is that V1 neurons play an important role in the selection of active sets of neurons. We show that strong inhibitory inputs coming from V1 neurons play a crucial role in suppressing the activities of slow-type V2a and motor neurons, and, consequently, of slow muscles during fast swimming. Our results thus highlight the critical role of spinal inhibitory neurons for silencing slow-component neurons during fast movements.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping