Temporal dynamics of visuo-tactile extinction within and between hemispaces

Marcello Costantini, Domenica Bueti, Mariella Pazzaglia, Salvatore M. Aglioti

Research output: Contribution to journalArticle

Abstract

The ability to detect left-sided stimuli (visual or tactile) was studied in visual and tactile extinction (RBD) patients and in healthy (C) subjects. Stimuli were single or double; double stimuli were always cross-modal and could be released across the 2 hemispaces or within the same hemispace. Moreover, the stimuli could be either simultaneous or separated by 1 of 3 different asynchronies (105, 505, 905 ms). C subjects were perfect in all conditions. RBD patients omitted the contralesional tactile stimulus in bilateral trials (across space, classical extinction). They also omitted the tactile stimulus in unilateral left trials (within hemispace). Both effects showed the same temporal modulation with lower extinction rates at longer stimulus onset asynchronies. Results suggest that attentional processing of a visual stimulus inhibits processing of a tactile one, even if both are delivered in the same contralesional hemispace.

Original languageEnglish
Pages (from-to)242-250
Number of pages9
JournalNeuropsychology
Volume21
Issue number2
DOIs
Publication statusPublished - Mar 2007

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Keywords

  • Cross-modal integration
  • Patients with brain damage
  • Tactile extinction
  • Temporal attention
  • Temporal order judgment
  • Visual extinction
  • Visuo-tactile extinction

ASJC Scopus subject areas

  • Biological Psychiatry
  • Neuropsychology and Physiological Psychology

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