RRC ID 66059
Author Picton LD, Bertuzzi M, Pallucchi I, Fontanel P, Dahlberg E, Björnfors ER, Iacoviello F, Shearing PR, El Manira A.
Title A spinal organ of proprioception for integrated motor action feedback.
Journal Neuron
Abstract Proprioception is essential for behavior and provides a sense of our body movements in physical space. Proprioceptor organs are thought to be only in the periphery. Whether the central nervous system can intrinsically sense its own movement remains unclear. Here we identify a segmental organ of proprioception in the adult zebrafish spinal cord, which is embedded by intraspinal mechanosensory neurons expressing Piezo2 channels. These cells are late-born, inhibitory, commissural neurons with unique molecular and physiological profiles reflecting a dual sensory and motor function. The central proprioceptive organ locally detects lateral body movements during locomotion and provides direct inhibitory feedback onto rhythm-generating interneurons responsible for the central motor program. This dynamically aligns central pattern generation with movement outcome for efficient locomotion. Our results demonstrate that a central proprioceptive organ monitors self-movement using hybrid neurons that merge sensory and motor entities into a unified network.
Volume 109(7)
Pages 1188-1201.e7
Published 2021-4-7
DOI 10.1016/j.neuron.2021.01.018
PII S0896-6273(21)00040-4
PMID 33577748
MeSH Animals Central Pattern Generators / physiology Feedback, Sensory / physiology* Female Interneurons / physiology Ion Channels / physiology Locomotion / physiology Male Mechanotransduction, Cellular Motor Neurons / physiology Movement / physiology* Nerve Net / cytology Nerve Net / physiology Proprioception / physiology* RNA / genetics Sensory Receptor Cells / physiology Spinal Cord / diagnostic imaging Spinal Cord / physiology Tomography, X-Ray Computed Zebrafish / physiology* Zebrafish Proteins / physiology
IF 14.415
Zebrafish Tg(dbx1b:Cre) Tg(vglut1-hs:GFP) Tg(vglut2a:lRl-GFP) Tg(glyt2:lRl-GFP)