Conveyance of texture signals along a rat whisker

Abstract Neuronal activities underlying a percept are constrained by the physics of sensory signals. In the tactile sense such constraints are frictional stick–slip events, occurring, amongst other vibrotactile features, when tactile sensors are in contact with objects. We reveal new biomechanical p...

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Autores principales:	Maysam Oladazimi, Thibaut Putelat, Robert Szalai, Kentaro Noda, Isao Shimoyama, Alan Champneys, Cornelius Schwarz
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/936b22719c694995a93f15e8b482b9e2
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spelling	oai:doaj.org-article:936b22719c694995a93f15e8b482b9e22021-12-02T18:18:44ZConveyance of texture signals along a rat whisker10.1038/s41598-021-92770-32045-2322https://doaj.org/article/936b22719c694995a93f15e8b482b9e22021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92770-3https://doaj.org/toc/2045-2322Abstract Neuronal activities underlying a percept are constrained by the physics of sensory signals. In the tactile sense such constraints are frictional stick–slip events, occurring, amongst other vibrotactile features, when tactile sensors are in contact with objects. We reveal new biomechanical phenomena about the transmission of these microNewton forces at the tip of a rat’s whisker, where they occur, to the base where they engage primary afferents. Using high resolution videography and accurate measurement of axial and normal forces at the follicle, we show that the conical and curved rat whisker acts as a sign-converting amplification filter for moment to robustly engage primary afferents. Furthermore, we present a model based on geometrically nonlinear Cosserat rod theory and a friction model that recreates the observed whole-beam whisker dynamics. The model quantifies the relation between kinematics (positions and velocities) and dynamic variables (forces and moments). Thus, only videographic assessment of acceleration is required to estimate forces and moments measured by the primary afferents. Our study highlights how sensory systems deal with complex physical constraints of perceptual targets and sensors.Maysam OladazimiThibaut PutelatRobert SzalaiKentaro NodaIsao ShimoyamaAlan ChampneysCornelius SchwarzNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Maysam Oladazimi Thibaut Putelat Robert Szalai Kentaro Noda Isao Shimoyama Alan Champneys Cornelius Schwarz Conveyance of texture signals along a rat whisker
description	Abstract Neuronal activities underlying a percept are constrained by the physics of sensory signals. In the tactile sense such constraints are frictional stick–slip events, occurring, amongst other vibrotactile features, when tactile sensors are in contact with objects. We reveal new biomechanical phenomena about the transmission of these microNewton forces at the tip of a rat’s whisker, where they occur, to the base where they engage primary afferents. Using high resolution videography and accurate measurement of axial and normal forces at the follicle, we show that the conical and curved rat whisker acts as a sign-converting amplification filter for moment to robustly engage primary afferents. Furthermore, we present a model based on geometrically nonlinear Cosserat rod theory and a friction model that recreates the observed whole-beam whisker dynamics. The model quantifies the relation between kinematics (positions and velocities) and dynamic variables (forces and moments). Thus, only videographic assessment of acceleration is required to estimate forces and moments measured by the primary afferents. Our study highlights how sensory systems deal with complex physical constraints of perceptual targets and sensors.
format	article
author	Maysam Oladazimi Thibaut Putelat Robert Szalai Kentaro Noda Isao Shimoyama Alan Champneys Cornelius Schwarz
author_facet	Maysam Oladazimi Thibaut Putelat Robert Szalai Kentaro Noda Isao Shimoyama Alan Champneys Cornelius Schwarz
author_sort	Maysam Oladazimi
title	Conveyance of texture signals along a rat whisker
title_short	Conveyance of texture signals along a rat whisker
title_full	Conveyance of texture signals along a rat whisker
title_fullStr	Conveyance of texture signals along a rat whisker
title_full_unstemmed	Conveyance of texture signals along a rat whisker
title_sort	conveyance of texture signals along a rat whisker
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/936b22719c694995a93f15e8b482b9e2
work_keys_str_mv	AT maysamoladazimi conveyanceoftexturesignalsalongaratwhisker AT thibautputelat conveyanceoftexturesignalsalongaratwhisker AT robertszalai conveyanceoftexturesignalsalongaratwhisker AT kentaronoda conveyanceoftexturesignalsalongaratwhisker AT isaoshimoyama conveyanceoftexturesignalsalongaratwhisker AT alanchampneys conveyanceoftexturesignalsalongaratwhisker AT corneliusschwarz conveyanceoftexturesignalsalongaratwhisker
_version_	1718378230967173120

Conveyance of texture signals along a rat whisker

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