Do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?

Passively grasping an unseen artificial finger induces ownership over this finger and an illusory coming together of one’s index fingers: a grasp illusion. Here we determine how interoceptive ability and attending to the upper limbs influence this illusion. Participants passively grasped an unseen a...

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Autores principales:	Annie A. Butler, Lucy S. Robertson, Audrey P. Wang, Simon C. Gandevia, Martin E. Héroux
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f4879708aa0f449aa00e2ed3c1697d23
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spelling	oai:doaj.org-article:f4879708aa0f449aa00e2ed3c1697d232021-11-25T06:19:47ZDo interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?1932-6203https://doaj.org/article/f4879708aa0f449aa00e2ed3c1697d232021-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC8598028/?tool=EBIhttps://doaj.org/toc/1932-6203Passively grasping an unseen artificial finger induces ownership over this finger and an illusory coming together of one’s index fingers: a grasp illusion. Here we determine how interoceptive ability and attending to the upper limbs influence this illusion. Participants passively grasped an unseen artificial finger with their left index finger and thumb for 3 min while their right index finger, located 12 cm below, was lightly clamped. Experiment 1 (n = 30) investigated whether the strength of the grasp illusion (perceived index finger spacing and perceived ownership) is related to a person’s level of interoceptive accuracy (modified heartbeat counting task) and sensibility (Noticing subscale of the Multidimensional Assessment of Interoceptive Awareness). Experiment 2 (n = 30) investigated the effect of providing verbal or tactile cues to guide participants’ attention to their upper limbs. On their own, neither interoceptive accuracy and sensibility or verbal and tactile cueing had an effect on the grasp illusion. However, verbal cueing increased the strength of the grasp illusion in individuals with lower interoceptive ability. Across the observed range of interoceptive accuracy and sensibility, verbal cueing decreased perceived index spacing by 5.6 cm [1.91 to 9.38] (mean [95%CI]), and perceived ownership by ∼3 points on a 7-point Likert scale (slope -0.93 [-1.72 to -0.15]). Thus, attending to the upper limbs via verbal cues increases the strength of the grasp illusion in a way that is inversely proportional to a person’s level of interoceptive accuracy and sensibility.Annie A. ButlerLucy S. RobertsonAudrey P. WangSimon C. GandeviaMartin E. HérouxPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Annie A. Butler Lucy S. Robertson Audrey P. Wang Simon C. Gandevia Martin E. Héroux Do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?
description	Passively grasping an unseen artificial finger induces ownership over this finger and an illusory coming together of one’s index fingers: a grasp illusion. Here we determine how interoceptive ability and attending to the upper limbs influence this illusion. Participants passively grasped an unseen artificial finger with their left index finger and thumb for 3 min while their right index finger, located 12 cm below, was lightly clamped. Experiment 1 (n = 30) investigated whether the strength of the grasp illusion (perceived index finger spacing and perceived ownership) is related to a person’s level of interoceptive accuracy (modified heartbeat counting task) and sensibility (Noticing subscale of the Multidimensional Assessment of Interoceptive Awareness). Experiment 2 (n = 30) investigated the effect of providing verbal or tactile cues to guide participants’ attention to their upper limbs. On their own, neither interoceptive accuracy and sensibility or verbal and tactile cueing had an effect on the grasp illusion. However, verbal cueing increased the strength of the grasp illusion in individuals with lower interoceptive ability. Across the observed range of interoceptive accuracy and sensibility, verbal cueing decreased perceived index spacing by 5.6 cm [1.91 to 9.38] (mean [95%CI]), and perceived ownership by ∼3 points on a 7-point Likert scale (slope -0.93 [-1.72 to -0.15]). Thus, attending to the upper limbs via verbal cues increases the strength of the grasp illusion in a way that is inversely proportional to a person’s level of interoceptive accuracy and sensibility.
format	article
author	Annie A. Butler Lucy S. Robertson Audrey P. Wang Simon C. Gandevia Martin E. Héroux
author_facet	Annie A. Butler Lucy S. Robertson Audrey P. Wang Simon C. Gandevia Martin E. Héroux
author_sort	Annie A. Butler
title	Do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?
title_short	Do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?
title_full	Do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?
title_fullStr	Do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?
title_full_unstemmed	Do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?
title_sort	do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/f4879708aa0f449aa00e2ed3c1697d23
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Do interoception and attending to the upper limbs affect body ownership and body representation in the grasp illusion?

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