Is right angular gyrus involved in the metric component of the mental body representation in touch and vision? A tdcs study

Grazia Fernanda Spitoni, Giorgio Pireddu, Valerio Zanellati, Beatrice Dionisi, Gaspare Galati, Luigi Pizzamiglio

Research output: Contribution to journalArticlepeer-review

Abstract

Several studies have found in the sense of touch a good sensory modality by which to study body representation. Here, we address the “metric component of body representation”, a specific function developed to process the discrimination of tactile distances on the body. The literature suggests the involvement of the right angular gyrus (rAG) in processing the tactile metricity on the body. The question of this study is the following: is the rAG also responsible for the visual metric component of body representation? We used tDCS (anodal and sham) in 20 subjects who were administered an on-body distance discrimination task with both tactile and visual stimuli. They were also asked to perform the same task in a near-body condition. The results allow us to confirm the role of rAG in the estimation of tactile distances. Further, we also showed that rAG might be involved in the discrimination of distances on the body not only in tactile but also in visual modality. Finally, based on the significant effects of anodal stimulation even in a near-body visual discrimination task, we proposed a higher-order function of the AG in terms of a supramodal com-parator of quantities.

Original languageEnglish
Article number284
Pages (from-to)1-11
Number of pages11
JournalBrain Sciences
Volume11
Issue number3
DOIs
Publication statusPublished - Mar 2021

Keywords

  • Angular gyrus
  • Body representation
  • Distance discrimination
  • IPL
  • TDCS

ASJC Scopus subject areas

  • Neuroscience(all)

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