Distinct contributions of Brodmann areas 1 and 2 to body ownership.

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Serval ID
serval:BIB_2E2DD80FB60C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Distinct contributions of Brodmann areas 1 and 2 to body ownership.
Journal
Social Cognitive and Affective Neuroscience
Author(s)
Martuzzi R., van der Zwaag W., Dieguez S., Serino A., Gruetter R., Blanke O.
ISSN
1749-5024 (Electronic)
ISSN-L
1749-5016
Publication state
Published
Issued date
2015
Peer-reviewed
Oui
Volume
10
Number
11
Pages
1449-1459
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
Although body ownership--i.e. the feeling that our bodies belong to us--modulates activity within the primary somatosensory cortex (S1), it is still unknown whether this modulation occurs within a somatotopically defined portion of S1. We induced an illusory feeling of ownership for another person's finger by asking participants to hold their palm against another person's palm and to stroke the two joined index fingers with the index and thumb of their other hand. This illusion (numbness illusion) does not occur if the stroking is performed asynchronously or by the other person. We combined this somatosensory paradigm with ultra-high field functional magnetic resonance imaging finger mapping to study whether illusory body ownership modulates activity within different finger-specific areas of S1. The results revealed that the numbness illusion is associated with activity in Brodmann area (BA) 1 within the representation of the finger stroking the other person's finger and in BA 2 contralateral to the stroked finger. These results show that changes in bodily experience modulate the activity within certain subregions of S1, with a different finger-topographical selectivity between the representations of the stroking and of the stroked hand, and reveal that the high degree of somatosensory specialization in S1 extends to bodily self-consciousness.
Keywords
Adolescent, Adult, Brain Mapping, Fingers/physiology, Humans, Illusions/physiology, Magnetic Resonance Imaging/methods, Male, Somatosensory Cortex/physiology, Touch Perception/physiology, Young Adult
Pubmed
Web of science
Open Access
Yes
Create date
26/03/2015 21:57
Last modification date
25/09/2019 6:08
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