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    A cerebellum-like circuit in the lateral line system of fish cancels mechanosensory input associated with its own movements

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    Article (1.007Mb)
    Date
    2020-01-17
    Author
    Perks, Krista E.  Concept link
    Krotinger, Anna  Concept link
    Bodznick, David  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/25528
    As published
    https://doi.org/10.1242/jeb.204438
    DOI
    10.1242/jeb.204438
    Keyword
     Cerebellum-like; Mechanosensory lateral line; Predictive cancellation; Reafference; Elasmobranch; Sensory system 
    Abstract
    An animal's own movement exerts a profound impact on sensory input to its nervous system. Peripheral sensory receptors do not distinguish externally generated stimuli from stimuli generated by an animal's own behavior (reafference) – although the animal often must. One way that nervous systems can solve this problem is to provide movement-related signals (copies of motor commands and sensory feedback) to sensory systems, which can then be used to generate predictions that oppose or cancel out sensory responses to reafference. Here, we studied the use of movement-related signals to generate sensory predictions in the lateral line medial octavolateralis nucleus (MON) of the little skate. In the MON, mechanoreceptive afferents synapse on output neurons that also receive movement-related signals from central sources, via a granule cell parallel fiber system. This parallel fiber system organization is characteristic of a set of so-called cerebellum-like structures. Cerebellum-like structures have been shown to support predictive cancellation of reafference in the electrosensory systems of fish and the auditory system of mice. Here, we provide evidence that the parallel fiber system in the MON can generate predictions that are negative images of (and therefore cancel) sensory input associated with respiratory and fin movements. The MON, found in most aquatic vertebrates, is probably one of the most primitive cerebellum-like structures and a starting point for cerebellar evolution. The results of this study contribute to a growing body of work that uses an evolutionary perspective on the vertebrate cerebellum to understand its functional diversity in animal behavior.
    Description
    Author Posting. © Company of Biologists, 2020. This article is posted here by permission of Company of Biologists for personal use, not for redistribution. The definitive version was published in Journal of Experimental Biology 223 (2020): jeb.204438, doi:10.1242/jeb.204438.
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    Suggested Citation
    Perks, K. E., Krotinger, A., & Bodznick, D. (2020). A cerebellum-like circuit in the lateral line system of fish cancels mechanosensory input associated with its own movements. Journal of Experimental Biology, 223, jeb.204438.
     

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