Temporal coherency of mechanical stimuli modulates tactile form perception

Abstract The human hand can detect both form and texture information of a contact surface. The detection of skin displacement (sustained stimulus) and changes in skin displacement (transient stimulus) are thought to be mediated in different tactile channels; however, tactile form perception may use...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Masashi Nakatani, Yasuaki Kobayashi, Kota Ohno, Masaaki Uesaka, Sayako Mogami, Zixia Zhao, Takamichi Sushida, Hiroyuki Kitahata, Masaharu Nagayama
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8ebe6c6beee14ac79aceea24418e28d3
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8ebe6c6beee14ac79aceea24418e28d3
record_format	dspace
spelling	oai:doaj.org-article:8ebe6c6beee14ac79aceea24418e28d32021-12-02T17:50:49ZTemporal coherency of mechanical stimuli modulates tactile form perception10.1038/s41598-021-90661-12045-2322https://doaj.org/article/8ebe6c6beee14ac79aceea24418e28d32021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90661-1https://doaj.org/toc/2045-2322Abstract The human hand can detect both form and texture information of a contact surface. The detection of skin displacement (sustained stimulus) and changes in skin displacement (transient stimulus) are thought to be mediated in different tactile channels; however, tactile form perception may use both types of information. Here, we studied whether both the temporal frequency and the temporal coherency information of tactile stimuli encoded in sensory neurons could be used to recognize the form of contact surfaces. We used the fishbone tactile illusion (FTI), a known tactile phenomenon, as a probe for tactile form perception in humans. This illusion typically occurs with a surface geometry that has a smooth bar and coarse textures in its adjacent areas. When stroking the central bar back and forth with a fingertip, a human observer perceives a hollow surface geometry even though the bar is physically flat. We used a passive high-density pin matrix to extract only the vertical information of the contact surface, suppressing tangential displacement from surface rubbing. Participants in the psychological experiment reported indented surface geometry by tracing over the FTI textures with pin matrices of the different spatial densities (1.0 and 2.0 mm pin intervals). Human participants reported that the relative magnitude of perceived surface indentation steeply decreased when pins in the adjacent areas vibrated in synchrony. To address possible mechanisms for tactile form perception in the FTI, we developed a computational model of sensory neurons to estimate temporal patterns of action potentials from tactile receptive fields. Our computational data suggest that (1) the temporal asynchrony of sensory neuron responses is correlated with the relative magnitude of perceived surface indentation and (2) the spatiotemporal change of displacements in tactile stimuli are correlated with the asynchrony of simulated sensory neuron responses for the fishbone surface patterns. Based on these results, we propose that both the frequency and the asynchrony of temporal activity in sensory neurons could produce tactile form perception.Masashi NakataniYasuaki KobayashiKota OhnoMasaaki UesakaSayako MogamiZixia ZhaoTakamichi SushidaHiroyuki KitahataMasaharu NagayamaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Masashi Nakatani Yasuaki Kobayashi Kota Ohno Masaaki Uesaka Sayako Mogami Zixia Zhao Takamichi Sushida Hiroyuki Kitahata Masaharu Nagayama Temporal coherency of mechanical stimuli modulates tactile form perception
description	Abstract The human hand can detect both form and texture information of a contact surface. The detection of skin displacement (sustained stimulus) and changes in skin displacement (transient stimulus) are thought to be mediated in different tactile channels; however, tactile form perception may use both types of information. Here, we studied whether both the temporal frequency and the temporal coherency information of tactile stimuli encoded in sensory neurons could be used to recognize the form of contact surfaces. We used the fishbone tactile illusion (FTI), a known tactile phenomenon, as a probe for tactile form perception in humans. This illusion typically occurs with a surface geometry that has a smooth bar and coarse textures in its adjacent areas. When stroking the central bar back and forth with a fingertip, a human observer perceives a hollow surface geometry even though the bar is physically flat. We used a passive high-density pin matrix to extract only the vertical information of the contact surface, suppressing tangential displacement from surface rubbing. Participants in the psychological experiment reported indented surface geometry by tracing over the FTI textures with pin matrices of the different spatial densities (1.0 and 2.0 mm pin intervals). Human participants reported that the relative magnitude of perceived surface indentation steeply decreased when pins in the adjacent areas vibrated in synchrony. To address possible mechanisms for tactile form perception in the FTI, we developed a computational model of sensory neurons to estimate temporal patterns of action potentials from tactile receptive fields. Our computational data suggest that (1) the temporal asynchrony of sensory neuron responses is correlated with the relative magnitude of perceived surface indentation and (2) the spatiotemporal change of displacements in tactile stimuli are correlated with the asynchrony of simulated sensory neuron responses for the fishbone surface patterns. Based on these results, we propose that both the frequency and the asynchrony of temporal activity in sensory neurons could produce tactile form perception.
format	article
author	Masashi Nakatani Yasuaki Kobayashi Kota Ohno Masaaki Uesaka Sayako Mogami Zixia Zhao Takamichi Sushida Hiroyuki Kitahata Masaharu Nagayama
author_facet	Masashi Nakatani Yasuaki Kobayashi Kota Ohno Masaaki Uesaka Sayako Mogami Zixia Zhao Takamichi Sushida Hiroyuki Kitahata Masaharu Nagayama
author_sort	Masashi Nakatani
title	Temporal coherency of mechanical stimuli modulates tactile form perception
title_short	Temporal coherency of mechanical stimuli modulates tactile form perception
title_full	Temporal coherency of mechanical stimuli modulates tactile form perception
title_fullStr	Temporal coherency of mechanical stimuli modulates tactile form perception
title_full_unstemmed	Temporal coherency of mechanical stimuli modulates tactile form perception
title_sort	temporal coherency of mechanical stimuli modulates tactile form perception
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8ebe6c6beee14ac79aceea24418e28d3
work_keys_str_mv	AT masashinakatani temporalcoherencyofmechanicalstimulimodulatestactileformperception AT yasuakikobayashi temporalcoherencyofmechanicalstimulimodulatestactileformperception AT kotaohno temporalcoherencyofmechanicalstimulimodulatestactileformperception AT masaakiuesaka temporalcoherencyofmechanicalstimulimodulatestactileformperception AT sayakomogami temporalcoherencyofmechanicalstimulimodulatestactileformperception AT zixiazhao temporalcoherencyofmechanicalstimulimodulatestactileformperception AT takamichisushida temporalcoherencyofmechanicalstimulimodulatestactileformperception AT hiroyukikitahata temporalcoherencyofmechanicalstimulimodulatestactileformperception AT masaharunagayama temporalcoherencyofmechanicalstimulimodulatestactileformperception
_version_	1718379298395521024

Temporal coherency of mechanical stimuli modulates tactile form perception

Ejemplares similares