Proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.

<h4>Background</h4>Adaptation to constant stimulation has often been used to investigate the mechanisms of perceptual coding, but the adaptive processes within the proprioceptive channels that encode body movement have not been well described. We investigated them using vibration as a st...

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Main Authors:	Tatjana Seizova-Cajic, Janette L Smith, Janet L Taylor, Simon C Gandevia
Format:	article
Language:	EN
Published:	Public Library of Science (PLoS) 2007
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/13f67835eb2548cd9d1c7e60b77f2fc6
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spelling	oai:doaj.org-article:13f67835eb2548cd9d1c7e60b77f2fc62021-11-25T06:10:41ZProprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.1932-620310.1371/journal.pone.0001037https://doaj.org/article/13f67835eb2548cd9d1c7e60b77f2fc62007-10-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0001037https://doaj.org/toc/1932-6203<h4>Background</h4>Adaptation to constant stimulation has often been used to investigate the mechanisms of perceptual coding, but the adaptive processes within the proprioceptive channels that encode body movement have not been well described. We investigated them using vibration as a stimulus because vibration of muscle tendons results in a powerful illusion of movement.<h4>Methodology/principal findings</h4>We applied sustained 90 Hz vibratory stimulation to biceps brachii, an elbow flexor and induced the expected illusion of elbow extension (in 12 participants). There was clear evidence of adaptation to the movement signal both during the 6-min long vibration and on its cessation. During vibration, the strong initial illusion of extension waxed and waned, with diminishing duration of periods of illusory movement and occasional reversals in the direction of the illusion. After vibration there was an aftereffect in which the stationary elbow seemed to move into flexion. Muscle activity shows no consistent relationship with the variations in perceived movement.<h4>Conclusion</h4>We interpret the observed effects as adaptive changes in the central mechanisms that code movement in direction-selective opponent channels.Tatjana Seizova-CajicJanette L SmithJanet L TaylorSimon C GandeviaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 2, Iss 10, p e1037 (2007)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tatjana Seizova-Cajic Janette L Smith Janet L Taylor Simon C Gandevia Proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.
description	<h4>Background</h4>Adaptation to constant stimulation has often been used to investigate the mechanisms of perceptual coding, but the adaptive processes within the proprioceptive channels that encode body movement have not been well described. We investigated them using vibration as a stimulus because vibration of muscle tendons results in a powerful illusion of movement.<h4>Methodology/principal findings</h4>We applied sustained 90 Hz vibratory stimulation to biceps brachii, an elbow flexor and induced the expected illusion of elbow extension (in 12 participants). There was clear evidence of adaptation to the movement signal both during the 6-min long vibration and on its cessation. During vibration, the strong initial illusion of extension waxed and waned, with diminishing duration of periods of illusory movement and occasional reversals in the direction of the illusion. After vibration there was an aftereffect in which the stationary elbow seemed to move into flexion. Muscle activity shows no consistent relationship with the variations in perceived movement.<h4>Conclusion</h4>We interpret the observed effects as adaptive changes in the central mechanisms that code movement in direction-selective opponent channels.
format	article
author	Tatjana Seizova-Cajic Janette L Smith Janet L Taylor Simon C Gandevia
author_facet	Tatjana Seizova-Cajic Janette L Smith Janet L Taylor Simon C Gandevia
author_sort	Tatjana Seizova-Cajic
title	Proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.
title_short	Proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.
title_full	Proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.
title_fullStr	Proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.
title_full_unstemmed	Proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.
title_sort	proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.
publisher	Public Library of Science (PLoS)
publishDate	2007
url	https://doaj.org/article/13f67835eb2548cd9d1c7e60b77f2fc6
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_version_	1718414088555462656

Proprioceptive movement illusions due to prolonged stimulation: reversals and aftereffects.

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