Behavior Genetics

, 36:845 | Cite as

Heritability and Reliability of P300, P50 and Duration Mismatch Negativity

  • Mei Hua Hall
  • Katja Schulze
  • Frühling Rijsdijk
  • Marco Picchioni
  • Ulrich Ettinger
  • Elvira Bramon
  • Robert Freedman
  • Robin M. Murray
  • Pak Sham
Original Paper

Abstract

Background

Event-related potentials (ERPs) have been suggested as possible endophenotypes of schizophrenia. We investigated the test–retest reliabilities and heritabilities of three ERP components in healthy monozygotic and dizygotic twin pairs.

Methods

ERP components (P300, P50 and MMN) were recorded using a 19-channel electroencephalogram (EEG) in 40 healthy monozygotic twin pairs, 19 of them on two separate occasions, and 30 dizygotic twin pairs. Zygosity was determined using DNA genotyping.

Results

High reliabilities were found for the P300 amplitude and its latency, MMN amplitude, and P50 suppression ratio components. Intra-class correlation (ICC) = 0.86 and 0.88 for the P300 amplitude and P300 latency respectively. Reliability of MMN peak amplitude and mean amplitude were 0.67 and 0.66 respectively. P50 T/C ratio reliability was 0.66. Model fitting analyses indicated a substantial heritability or familial component of variance for these ERP measures. Heritability estimates were 63 and 68% for MMN peak amplitude and mean amplitude respectively. For P50 T/C ratio, 68% heritability was estimated. P300 amplitude heritability was estimated at 69%, and while a significant familiality effect was found for P300 latency there was insufficient power to distinguish between shared environment and genetic factors.

Conclusions

The high reliability and heritability of the P300 amplitude, MMN amplitude, and P50 suppression ratio components supports their use as candidate endophenotypes for psychiatric research.

Keywords

Reliability ERPs Twins Genetic analysis Heritability 

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Mei Hua Hall
    • 1
    • 2
  • Katja Schulze
    • 2
  • Frühling Rijsdijk
    • 1
  • Marco Picchioni
    • 2
  • Ulrich Ettinger
    • 3
  • Elvira Bramon
    • 2
  • Robert Freedman
    • 4
  • Robin M. Murray
    • 2
  • Pak Sham
    • 1
    • 5
  1. 1.Social, Genetic Developmental Psychiatry Research Centre, Institute of PsychiatryKing’s College LondonLondonUK
  2. 2.Division of Psychological Medicine, Institute of PsychiatryKing’s College LondonLondonUK
  3. 3.Neuroimaging Research Group, Institute of PsychiatryKing’s College LondonLondonUK
  4. 4.Departments of Psychiatry and PharmacologyUniversity of Colorado Health Sciences CenterDenverUSA
  5. 5.Department of PsychiatryUniversity of Hong KongHong KongChina

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