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Conscious and Non-conscious Representations of Emotional Faces in Asperger's Syndrome
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Published on: July 31, 2016

Mismatched expressions decrease face recognition and corresponding ERP old/new effects in schizophrenia.

Fabrice Guillaume1, François Guillem, Guy Tiberghien

  • 1Laboratory of Cognitive Psychology, Aix-Marseille University, 13003 Marseille Cedex 3 France. Fabrice.Guillaume@univamu.fr

Neuropsychology
|June 13, 2012
PubMed
Summary
This summary is machine-generated.

Schizophrenia patients show impaired face recognition when facial expressions change, lacking specific brain responses (ERPs). This deficit stems from difficulties in familiarity processing, offering new insights into recognition challenges.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Face recognition is crucial for social interaction.
  • Schizophrenia is associated with significant social cognition deficits.
  • Electrophysiological correlates of face recognition impairments are not fully understood.

Purpose of the Study:

  • To investigate the electrophysiological (ERP) correlates of face recognition deficits in schizophrenia.
  • To examine how changes in facial expression affect face recognition and associated ERPs in schizophrenia patients.
  • To explore the role of familiarity processing in schizophrenia-related face recognition impairments.

Main Methods:

  • Utilized a long-term face-recognition task.
  • Compared patients with schizophrenia (n=20) to matched healthy participants (n=20).
  • Analyzed event-related potentials (ERPs), including midfrontal FN400 and late parietal old/new effects, under conditions of matched and mismatched facial expressions.

Main Results:

  • Facial expression changes significantly decreased face discriminability in schizophrenia patients compared to controls.
  • Schizophrenia patients exhibited an absence of midfrontal FN400 and late parietal ERP old/new effects during mismatched expression recognition.
  • These ERP effects were preserved in both groups when facial expressions remained unchanged.

Conclusions:

  • The recognition deficit in schizophrenia, particularly with expression changes, is linked to impaired familiarity assessment mechanisms, as indicated by ERP findings.
  • The study highlights the impact of expression change on retrieval processes, offering novel insights into schizophrenia-linked face recognition deficits.
  • Phenomenological differences in familiarity emergence provide a new perspective on these cognitive impairments.