Multiple foci of spatial attention in multimodal working memory

Tobias Katus (Corresponding Author), Martin Eimer

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The maintenance of sensory information in working memory (WM) is mediated by the attentional activation of stimulus representations that are stored in perceptual brain regions. Using event-related potentials (ERPs), we measured tactile and visual contralateral delay activity (tCDA/CDA components) in a bimodal WM task to concurrently track the attention-based maintenance of information stored in anatomically segregated (somatosensory and visual) brain areas. Participants received tactile and visual sample stimuli on both sides, and in different blocks, memorized these samples on the same side or on opposite sides. After a retention delay, memory was unpredictably tested for touch or vision. In the same side blocks, tCDA and CDA components simultaneously emerged over the same hemisphere, contralateral to the memorized tactile/visual sample set. In opposite side blocks, these two components emerged over different hemispheres, but had the same sizes and onset latencies as in the same side condition. Our results reveal distinct foci of tactile and visual spatial attention that were concurrently maintained on task-relevant stimulus representations in WM. The independence of spatially-specific biasing mechanisms for tactile and visual WM content suggests that multimodal information is stored in distributed perceptual brain areas that are activated through modality-specific processes that can operate simultaneously and largely independently of each other.

Original languageEnglish
Pages (from-to)583-589
Number of pages7
JournalNeuroimage
Volume142
Early online date17 Aug 2016
DOIs
Publication statusPublished - 15 Nov 2016

    Fingerprint

Keywords

  • Adult
  • Attention/physiology
  • Electroencephalography/methods
  • Evoked Potentials/physiology
  • Female
  • Functional Laterality/physiology
  • Humans
  • Male
  • Memory, Short-Term/physiology
  • Somatosensory Cortex/physiology
  • Space Perception/physiology
  • Touch Perception/physiology
  • Visual Cortex/physiology
  • Young Adult

Cite this