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Frontal and superior temporal auditory processing abnormalities in schizophrenia.

Yu-Han Chen1, J Christopher Edgar, Mingxiong Huang

  • 1University of New Mexico School of Medicine, Department of Psychiatry, Albuquerque, NM, USA ; New Mexico Raymond G. Murphy VA Healthcare System, Psychiatry Research, Albuquerque, NM, USA.

Neuroimage. Clinical
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PubMed
Summary
This summary is machine-generated.

Schizophrenia (SZ) patients show reduced auditory processing in the superior temporal gyrus (STG) compared to healthy controls (HC). Abnormalities extend beyond the STG to frontal and supramarginal areas, indicating a widespread auditory network issue.

Keywords:
AuditoryDTI, diffusion tensor imagingECG, electrocardiogramEEG, electroencephalographyEOG, electro-oculogramERF, event-related fieldERP, event-related potentialFDR, false discovery ratesFrontal cortexHC, healthy controlsIFG, inferior frontal gyrusITG, inferior temporal gyrusMEGMEG, magnetoencephalographyPANSS, Positive and Negative Syndrome ScalePFC, prefrontal cortexS1, first clickS2, second clickSES, socioeconomic statusSFG, superior frontal gyrusSMA, supplementary motor areaSMG, supramarginal gyrusSSS, Signal Space SeparationSTG, superior temporal gyrusSchizophreniaSuperior temporal gyrusVESTAL, Vector-based Spatio-temporal Analysis using L1-minimum normfMRI, functional magnetic resonance imagingsMRI, structural magnetic resonance imaging

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Biomedical Engineering

Background:

  • Magnetoencephalography (MEG) studies indicate superior temporal gyrus (STG) auditory processing abnormalities in schizophrenia (SZ) at 50 and 100 ms.
  • Electroencephalography (EEG) and corticography studies suggest broader brain area involvement, including frontal regions, during auditory processing in SZ.
  • Previous research highlights temporal discrepancies in identifying the full scope of auditory network dysfunction in schizophrenia.

Purpose of the Study:

  • To identify auditory encoding processes between 30 and 130 ms in schizophrenia (SZ) and healthy controls (HC).
  • To investigate cortical group differences in auditory processing during this interval.
  • To map the spatial and temporal dynamics of auditory network activity in SZ versus HC.

Main Methods:

  • Utilized the standard paired-click paradigm with magnetoencephalography (MEG) for data acquisition.
  • Employed Vector-based Spatial-temporal Analysis using L1-minimum-norm (VESTAL) for 4D activity mapping (30-130 ms).
  • Conducted within-group and between-group t-tests to compare activity at 50 ms and 100 ms post-stimulus.

Main Results:

  • Both groups exhibited bilateral STG activity at 50 ms and 100 ms.
  • Healthy controls (HC) demonstrated significantly stronger bilateral STG activity than schizophrenia (SZ) patients.
  • Group differences extended beyond STG, with HC showing greater inferior frontal gyrus activity, while SZ patients exhibited stronger right superior frontal gyrus and left supramarginal gyrus activity.

Conclusions:

  • Reduced STG activity in SZ suggests auditory encoding deficits.
  • Auditory encoding abnormalities in SZ are not confined to the STG, involving frontal and supramarginal gyrus areas.
  • Schizophrenia involves dysfunction across multiple nodes within a concurrently activated auditory network.