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Simultaneous face and voice processing in schizophrenia.

Taosheng Liu1, Ana P Pinheiro2, Zhongxin Zhao3

  • 1Department of Psychology, Second Military Medical University (SMMU), Shanghai, China; Department of Neurology, Changzheng Hospital, SMMU, Shanghai, China.

Behavioural Brain Research
|January 26, 2016
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Summary
This summary is machine-generated.

Schizophrenia patients show deficits in processing combined face and voice information, impacting facial encoding and feature extraction. However, categorization processes may benefit from simultaneous audiovisual stimuli.

Keywords:
FaceMultimodal processingN170P270P400SchizophreniaVoice

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Area of Science:

  • Neuroscience
  • Psychiatry

Background:

  • Schizophrenia (SZ) is associated with unisensory processing deficits in faces and voices.
  • The impact of SZ on multisensory integration of face and voice information is not well understood.

Purpose of the Study:

  • To investigate multisensory integration of face and non-semantic sounds in schizophrenia using event-related potentials (ERP).
  • To compare neural responses between schizophrenia patients and healthy controls in unimodal and audiovisual conditions.

Main Methods:

  • Electroencephalography (EEG) recorded from 18 schizophrenia patients and 19 healthy controls (HC).
  • Stimuli included neutral faces (VIS), neutral non-semantic sounds (AUD), and simultaneous face-sound (AUDVIS).
  • Analysis focused on ERP components like N170, P270, and P400.

Main Results:

  • Schizophrenia group exhibited reduced N170 to faces and face-voice stimuli compared to HC.
  • Delayed P270 peak latency in the audiovisual condition for schizophrenia patients.
  • Reduced P400 amplitude and earlier latency observed for faces in schizophrenia patients.

Conclusions:

  • Deficits in facial information encoding extend to multisensory face-voice stimuli in schizophrenia.
  • Schizophrenia involves delays in feature extraction from multimodal face-voice stimuli.
  • Categorization processes appear to benefit from simultaneous face-voice information in schizophrenia.