Neurodynamic studies on emotional and inverted faces in an oddball paradigm

  • Susac A
  • Ilmoniemi R
  • Pihko E
 et al. 
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Abstract

The detection of a change in a face stimulus was studied in an oddball paradigm. Event-related potentials (ERPs) and MEG responses to face stimuli were recorded in four conditions: 1) happy standard, neutral deviant; 2) neutral standard, neutral deviant; 3) inverted happy standard, inverted neutral deviant; 4) inverted neutral standard, inverted neutral deviant. In all conditions, the target was a face with glasses. Neutral deviants elicited a negative deflection (with a maximum around 280 ms) in ERP and MEG responses, an effect similar to auditory mismatch negativity. Face inversion diminished deviance-related negativity, implying an important role of face recognition in the observed effect. Emotional content and larger physical differences between stimuli in conditions 1 and 3 compared to conditions 2 and 4 did not show statistically significant effect on the neutral-deviant-related negativity.

Author-supplied keywords

  • ERP
  • Face inversion
  • Face recognition
  • Facial expression
  • MEG
  • MMN
  • Oddball paradigm

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