Specific forms of neural activity associated with tactile space awareness

Massimiliano Oliveri, Paolo Maria Rossini, Maria Maddalena Filippi, Raimondo Traversa, Paola Cicinelli, Carlo Caltagirone

Research output: Contribution to journalArticle

Abstract

Left tactile extinction, in which a left tactile stimulus fails to access consciousness only when a right stimulus is presented simultaneously, offers a model for studying tactile awareness from its transitory absence. Pairs of transcranial magnetic stimuli (TMS) on the parietal cortex inhibit contralateral tactile perception when separated by an interval of I ms. We have applied this technique on the left parietal cortex of right brain damaged (RBD) patients and normal subjects and have shown a selective lack of paired TMS inhibitory effects on right tactile perception of patients during bimanual stimulation. TMS effects were normal during unimanual right stimulation. These results suggest the presence of a specific pattern of inhibitory/excitatory interactions in parietal brain areas as critical for tactile awareness.

Original languageEnglish
Pages (from-to)997-1001
Number of pages5
JournalNeuroReport
Volume13
Issue number8
Publication statusPublished - Jun 12 2002

Keywords

  • Extinction
  • Parietal lobe
  • Tactile awareness
  • TMS

ASJC Scopus subject areas

  • Neuroscience(all)

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    Oliveri, M., Rossini, P. M., Filippi, M. M., Traversa, R., Cicinelli, P., & Caltagirone, C. (2002). Specific forms of neural activity associated with tactile space awareness. NeuroReport, 13(8), 997-1001.