{"title":"通过视觉-触觉重新校准来调整感知手图的大小。","authors":"Xaver Fuchs, Tobias Heed","doi":"10.1111/ejn.16571","DOIUrl":null,"url":null,"abstract":"<p><p>After concurrent visual and tactile stimuli have been presented repeatedly with a spatial offset, unisensory tactile stimuli, too, are perceived with a spatial bias towards the previously presented visual stimuli. This so-called visual-tactile ventriloquism aftereffect reflects crossmodal recalibration. As touch is intrinsically linked to body parts, we asked here whether recalibration occurs at the level of individual stimuli or at a higher, integrated, map-like level. We applied tactile stimuli to participants' hidden left hand and simultaneously presented visual stimuli with spatial offsets that, if integrated with the tactile stimuli, implied a larger hand. After recalibration, participants pointed to tactile-only stimuli and judged the distance between two tactile stimuli on the hand. The pattern of changes in tactile localization after recalibration was consistent with participants aiming at targets on an enlarged hand. This effect was evident also for new, tactile-only locations that had not been paired with visual stimuli during recalibration. In contrast, distance judgements were not consistently affected by recalibration. The generalization of recalibration to new, non-trained stimulus sites, but not across tasks and responses, suggests a link of low-level multisensory processing and map-like body representations that may, however, be purpose-specific and not organized as a general-purpose \"body schema\".</p>","PeriodicalId":11993,"journal":{"name":"European Journal of Neuroscience","volume":" ","pages":""},"PeriodicalIF":2.7000,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Rescaling perceptual hand maps by visual-tactile recalibration.\",\"authors\":\"Xaver Fuchs, Tobias Heed\",\"doi\":\"10.1111/ejn.16571\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>After concurrent visual and tactile stimuli have been presented repeatedly with a spatial offset, unisensory tactile stimuli, too, are perceived with a spatial bias towards the previously presented visual stimuli. This so-called visual-tactile ventriloquism aftereffect reflects crossmodal recalibration. As touch is intrinsically linked to body parts, we asked here whether recalibration occurs at the level of individual stimuli or at a higher, integrated, map-like level. We applied tactile stimuli to participants' hidden left hand and simultaneously presented visual stimuli with spatial offsets that, if integrated with the tactile stimuli, implied a larger hand. After recalibration, participants pointed to tactile-only stimuli and judged the distance between two tactile stimuli on the hand. The pattern of changes in tactile localization after recalibration was consistent with participants aiming at targets on an enlarged hand. This effect was evident also for new, tactile-only locations that had not been paired with visual stimuli during recalibration. In contrast, distance judgements were not consistently affected by recalibration. The generalization of recalibration to new, non-trained stimulus sites, but not across tasks and responses, suggests a link of low-level multisensory processing and map-like body representations that may, however, be purpose-specific and not organized as a general-purpose \\\"body schema\\\".</p>\",\"PeriodicalId\":11993,\"journal\":{\"name\":\"European Journal of Neuroscience\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-11-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"European Journal of Neuroscience\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1111/ejn.16571\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"NEUROSCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Neuroscience","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1111/ejn.16571","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"NEUROSCIENCES","Score":null,"Total":0}
Rescaling perceptual hand maps by visual-tactile recalibration.
After concurrent visual and tactile stimuli have been presented repeatedly with a spatial offset, unisensory tactile stimuli, too, are perceived with a spatial bias towards the previously presented visual stimuli. This so-called visual-tactile ventriloquism aftereffect reflects crossmodal recalibration. As touch is intrinsically linked to body parts, we asked here whether recalibration occurs at the level of individual stimuli or at a higher, integrated, map-like level. We applied tactile stimuli to participants' hidden left hand and simultaneously presented visual stimuli with spatial offsets that, if integrated with the tactile stimuli, implied a larger hand. After recalibration, participants pointed to tactile-only stimuli and judged the distance between two tactile stimuli on the hand. The pattern of changes in tactile localization after recalibration was consistent with participants aiming at targets on an enlarged hand. This effect was evident also for new, tactile-only locations that had not been paired with visual stimuli during recalibration. In contrast, distance judgements were not consistently affected by recalibration. The generalization of recalibration to new, non-trained stimulus sites, but not across tasks and responses, suggests a link of low-level multisensory processing and map-like body representations that may, however, be purpose-specific and not organized as a general-purpose "body schema".
期刊介绍:
EJN is the journal of FENS and supports the international neuroscientific community by publishing original high quality research articles and reviews in all fields of neuroscience. In addition, to engage with issues that are of interest to the science community, we also publish Editorials, Meetings Reports and Neuro-Opinions on topics that are of current interest in the fields of neuroscience research and training in science. We have recently established a series of ‘Profiles of Women in Neuroscience’. Our goal is to provide a vehicle for publications that further the understanding of the structure and function of the nervous system in both health and disease and to provide a vehicle to engage the neuroscience community. As the official journal of FENS, profits from the journal are re-invested in the neuroscientific community through the activities of FENS.