Alpha stimulation of the human parietal cortex attunes tactile perception to external space

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  • dc.contributor.author Ruzzoli, Manuelaca
  • dc.contributor.author Soto-Faraco, Salvador, 1970-ca
  • dc.date.accessioned 2018-05-09T08:22:14Z
  • dc.date.available 2018-05-09T08:22:14Z
  • dc.date.issued 2014
  • dc.description.abstract An intriguing question in neuroscience concerns how somatosensory events on the skin are represented in the human brain. Since Head and Holmes’ [1] neuropsychological dissociation between localizing touch on the skin and localizing body parts in external space, touch is considered to operate in a variety of spatial reference frames [2]. At least two representations of space are in competition during orienting to touch: a somatotopic one, reflecting the organization of the somatosensory cortex (S1) [3], and a more abstract, external reference frame that factors postural changes in relation to body parts and/or external space [4, 5]. Previous transcranial magnetic stimulation (TMS) studies suggest that the posterior parietal cortex (PPC) plays a key role in supporting representations as well as orienting attention in an external reference frame [4, 6]. Here, we capitalized on the TMS entrainment approach [7, 8], targeting the intraparietal sulcus (IPS). We found that frequency-specific (10 Hz) tuning of the PPC induced spatially specific enhancement of tactile detection that was expressed in an external reference frame. This finding establishes a tight causal link between a concrete form of brain activity (10 Hz oscillation) and a specific type of spatial representation, revealing a fundamental property of how the parietal cortex encodes information.
  • dc.description.sponsorship This work was supported by grants from the European Research Council (StG-2010 263145), the Spanish Ministry of Science and Innovation (PSI2010-15426), and the Comissionat per a Universitats i Recerca del DIUE-Generalitat de Catalunya (SRG2009-092) to S.S.-F.
  • dc.format.mimetype application/pdf
  • dc.identifier.citation Ruzzoli M, Soto-Faraco S. Alpha stimulation of the human parietal cortex attunes tactile perception to external space. Curr. Biol. 2014;24(3):329-32. DOI: 10.1016/j.cub.2013.12.029
  • dc.identifier.doi http://dx.doi.org/10.1016/j.cub.2013.12.029
  • dc.identifier.issn 0960-9822
  • dc.identifier.uri http://hdl.handle.net/10230/34589
  • dc.language.iso eng
  • dc.publisher Elsevierca
  • dc.relation.ispartof Current Biology. 2014;24(3):329-32.
  • dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/263145
  • dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/PSI2010-15426
  • dc.rights © Elsevier http://dx.doi.org/10.1016/j.cub.2013.12.029
  • dc.rights.accessRights info:eu-repo/semantics/openAccess
  • dc.subject.keyword Human perception
  • dc.subject.keyword Touch
  • dc.subject.keyword Tactile remapping
  • dc.subject.keyword Alpha rhythm
  • dc.subject.keyword Intra-Parietal Sulcus (IPS)
  • dc.subject.keyword Transcranial magnetic stimulation (TMS)
  • dc.subject.keyword Entrainment
  • dc.title Alpha stimulation of the human parietal cortex attunes tactile perception to external spaceca
  • dc.type info:eu-repo/semantics/article
  • dc.type.version info:eu-repo/semantics/acceptedVersion