Event-related potentials from a visual categorization task

Andrea Antal, S. Kéri, Gyula Kovács, Péter Liszli, Z. Janka, G. Benedek

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Investigation of the neural bases of human perceptual categorization is a continuously growing territory of visual sciences. Recently, several papers appeared on the cortical bases of human categorization performance, using functional brain imaging techniques such as positron emission tomography (PET) or functional magnetic resonance imaging (fMRI). However, the cheaper commercially available laboratory tests are not always the best methods to study multiple aspects of visual categorization. In this study, we describe the electrophysiological correlates of natural scene categorization in humans. The subject's task was to decide whether briefly presented natural scenes contained animal or non-animal items. Analysis of event-related potentials (ERPs) recorded during the categorization task, revealed more negative potentials for non-animal stimuli (NAS) in the time windows of 150-250 ms (N1) and 350-500 ms (N2), and more positive potentials for animal stimuli (AS) in the time window of 250-350 ms (P2). Our work provides an inexpensive noninvasive method to study both early perceptual and late phases of semantic information processing by recording ERPs during the categorization of natural scenes.

Original languageEnglish
Pages (from-to)131-136
Number of pages6
JournalBrain Research Protocols
Volume7
Issue number2
DOIs
Publication statusPublished - Jun 2001

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Evoked Potentials
Functional Neuroimaging
Automatic Data Processing
Semantics
Positron-Emission Tomography
Magnetic Resonance Imaging

Keywords

  • Categorization
  • Event-related potential
  • N1
  • N2
  • Natural scenes
  • P2
  • Visual processing

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Event-related potentials from a visual categorization task. / Antal, Andrea; Kéri, S.; Kovács, Gyula; Liszli, Péter; Janka, Z.; Benedek, G.

In: Brain Research Protocols, Vol. 7, No. 2, 06.2001, p. 131-136.

Research output: Contribution to journalArticle

Antal, Andrea ; Kéri, S. ; Kovács, Gyula ; Liszli, Péter ; Janka, Z. ; Benedek, G. / Event-related potentials from a visual categorization task. In: Brain Research Protocols. 2001 ; Vol. 7, No. 2. pp. 131-136.
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