Differential Processing of Isolated Object and Multi-item Pop-Out Displays in LIP and PFC

Ethan M. Meyers, Andy Liang, Fumi Katsuki, Christos Constantinidis

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Objects that are highly distinct from their surroundings appear to visually "pop-out." This effect is present for displays in which: (1) a single cue object is shown on a blank background, and (2) a single cue object is highly distinct from surrounding objects; it is generally assumed that these 2 display types are processed in the same way. To directly examine this, we applied a decoding analysis to neural activity recorded from the lateral intraparietal (LIP) area and the dorsolateral prefrontal cortex (dlPFC). Our analyses showed that for the single-object displays, cue location information appeared earlier in LIP than in dlPFC. However, for the display with distractors, location information was substantially delayed in both brain regions, and information first appeared in dlPFC. Additionally, we see that pattern of neural activity is similar for both types of displays and across different color transformations of the stimuli, indicating that location information is being coded in the same way regardless of display type. These results lead us to hypothesize that 2 different pathways are involved processing these 2 types of pop-out displays.
Original languageEnglish (US)
Pages (from-to)3816-3828
Number of pages13
JournalCerebral Cortex
Volume28
Issue number11
DOIs
StatePublished - Oct 11 2017
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-09
Acknowledgements: Center for Brains, Minds and Machines, funded by The National Science Foundation (NSF) STC award (CCF-1231216) to E.M.; and by the National Eye Institute of the National Institutes of Health under award number (R01 EY016773) to C.C.
Additional support comes from Adobe, HondaResearch Institute USA, and a King Abdullah University of Science and Technology grant to B. DeVore.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • General Medicine
  • Cellular and Molecular Neuroscience
  • Cognitive Neuroscience

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