Filtering of distractors during visual search studied by positron emission tomography

A. C. Nobre*, G. N. Sebestyen, D. R. Gitelman, C. D. Frith, M. M. Mesulam

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We investigated the sensitivity of brain areas to the presence of filtering operations during overt visual search in crowded displays. Task conditions involved either visual search or predetermined simple eye movements for the detection of target digits. Furthermore, visual displays either contained letter foils that required filtering or contained only target digits. Brain imaging using positron emission tomography showed extensive overlap between areas involved in overt visual search and eye movements. Selective filtering of foils affected visual processing in ventral areas associated with object recognition and in primary visual cortex.

Original languageEnglish (US)
Pages (from-to)968-976
Number of pages9
Issue number4
StatePublished - Aug 2002

ASJC Scopus subject areas

  • Neurology
  • Cognitive Neuroscience


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