Anisotropic distortion in the perceived orientation of stimuli on the arm

Abstract Mechanoreceptors on the skin are heterogeneously distributed, and the sampling of neural signals in the brain can vary depending on the part of the body. Therefore, it can be challenging for the brain to consistently represent stimuli applied to different body sites. Here, we report an exam...

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Autor principal:	Scinob Kuroki
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/97f596a6f847416a87c82e418b0e3a4d
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id	oai:doaj.org-article:97f596a6f847416a87c82e418b0e3a4d
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spelling	oai:doaj.org-article:97f596a6f847416a87c82e418b0e3a4d2021-12-02T15:33:00ZAnisotropic distortion in the perceived orientation of stimuli on the arm10.1038/s41598-021-93959-22045-2322https://doaj.org/article/97f596a6f847416a87c82e418b0e3a4d2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93959-2https://doaj.org/toc/2045-2322Abstract Mechanoreceptors on the skin are heterogeneously distributed, and the sampling of neural signals in the brain can vary depending on the part of the body. Therefore, it can be challenging for the brain to consistently represent stimuli applied to different body sites. Here, we report an example of a regional perceptual distortion of the tactile space. We used a piezoelectric braille display to examine shape perception on the volar surface of the arm and to compare it to that on the palm. We found that the orientation of perceived stimuli on the arm was distorted in certain areas. In particular, an inwardly-inclined line shape was perceived as being more inwardly-inclined than it actually was. On the other hand, an outwardly-inclined line was perceived accurately. When the same stimuli were applied to the palm, this anisotropic bias was not observed. We also found that changing the posture of the arm changed the angle at which this anisotropic distortion occurred, suggesting the influence of the skin frame of reference on this illusion. This study showed a clear example of how the representation of even simple stimuli is complexly distinct when the stimuli are applied to different body sites.Scinob KurokiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Scinob Kuroki Anisotropic distortion in the perceived orientation of stimuli on the arm
description	Abstract Mechanoreceptors on the skin are heterogeneously distributed, and the sampling of neural signals in the brain can vary depending on the part of the body. Therefore, it can be challenging for the brain to consistently represent stimuli applied to different body sites. Here, we report an example of a regional perceptual distortion of the tactile space. We used a piezoelectric braille display to examine shape perception on the volar surface of the arm and to compare it to that on the palm. We found that the orientation of perceived stimuli on the arm was distorted in certain areas. In particular, an inwardly-inclined line shape was perceived as being more inwardly-inclined than it actually was. On the other hand, an outwardly-inclined line was perceived accurately. When the same stimuli were applied to the palm, this anisotropic bias was not observed. We also found that changing the posture of the arm changed the angle at which this anisotropic distortion occurred, suggesting the influence of the skin frame of reference on this illusion. This study showed a clear example of how the representation of even simple stimuli is complexly distinct when the stimuli are applied to different body sites.
format	article
author	Scinob Kuroki
author_facet	Scinob Kuroki
author_sort	Scinob Kuroki
title	Anisotropic distortion in the perceived orientation of stimuli on the arm
title_short	Anisotropic distortion in the perceived orientation of stimuli on the arm
title_full	Anisotropic distortion in the perceived orientation of stimuli on the arm
title_fullStr	Anisotropic distortion in the perceived orientation of stimuli on the arm
title_full_unstemmed	Anisotropic distortion in the perceived orientation of stimuli on the arm
title_sort	anisotropic distortion in the perceived orientation of stimuli on the arm
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/97f596a6f847416a87c82e418b0e3a4d
work_keys_str_mv	AT scinobkuroki anisotropicdistortionintheperceivedorientationofstimulionthearm
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Anisotropic distortion in the perceived orientation of stimuli on the arm

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