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Topography of CNV and PINV in schizotypal personality

Published online by Cambridge University Press:  01 May 1998

C. KLEIN ,
B. ANDRESEN ,
P. BERG ,
H. KRÜGER  and
B. ROCKSTROH
C. KLEIN
Affiliation:
University of Freiburg, Germany
B. ANDRESEN
Affiliation:
University of Hamburg, Germany
P. BERG
Affiliation:
University of Konstanz, Germany
H. KRÜGER
Affiliation:
University of Freiburg, Germany
B. ROCKSTROH
Affiliation:
University of Konstanz, Germany
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Abstract

The topography of the postimperative negative variation (PINV) was analyzed in participants with high and low scores on the German version of the Schizotypal Personality Questionnaire. Scalp amplitude and Laplacian maps of the terminal contingent negative variation (tCNV) and PINV and the time course of the PINV were compared between the two groups. CNV and PINV were induced with a delayed matching-to-sample task, in which the pattern of the imperative stimulus was either clearly or ambiguous matched to one of the two diamonds simultaneously presented as a warning stimulus 4.0 s earlier. Electroencephalograms were recorded with a DC amplifier (32 channels). Negativity increased from tCNV to PINV, especially at frontal sites, and the PINV was larger under ambiguous than under clear matching conditions. Low-scoring participants showed a right-sided predominance of the PINV, which was absent in high-scoring participants. These results resemble differences in the topography of the PINV between healthy control participants and those with schizophrenia under identical experimental conditions and suggest functional differences between tCNV and PINV.

Keywords

Slow cortical potentialsCNVPINVTopographySchizotypal personality
Type
Research Article
Information
Psychophysiology , Volume 35 , Issue 3 , May 1998 , pp. 272 - 282
Copyright
© 1998 Society for Psychophysiological Research

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