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  • 1
    Electronic Resource
    Electronic Resource
    Emotional expectancy: Brain electrical activity associated with an emotional bias in interpreting life events (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 33 (1996), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: University students in either an optimistic or pessimistic mood state read brief stories of daily life events as event-related brain potentials were collected during the final word of each story. For subjects in a pessimistic mood, a bias to expect negative outcomes was seen as an N400/P300 effect over posterior scalp regions. For subjects in an optimistic mood, a differentiation between good and bad outcomes was also observed, but it was specific to medial frontal areas. Analysis of single-trial P300 latencies suggested that semantically incongruent and mood-incongruent outcome words resulted in increased median latency of the late positive complex (LPC) and resulted in increased variability of LPC latency across trials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1469-8986.1996.tb00419.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Identification of neural circuits underlying P300 abnormalities in schizophrenia (1999)
    Oxford, UK : Blackwell Publishing
    Psychophysiology 36 (1999), S. 0 
    Details
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Event-related potentials (ERPs) provide a noninvasive method to evaluate neural activation and cognitive processes in schizophrenia. The pathophysiological significance of these findings would be greatly enhanced if scalp-recorded ERP abnormalities could be related to specific neural circuits and/or regions of the brain. Using quantitative approaches in which scalp-recorded ERP components are correlated with underlying neuroanatomy in schizophrenia, we focused on biophysical and statistical procedures (partial least squares) to relate the auditory P300 component to anatomic measures obtained from quantitative magnetic resonance imaging. These findings are consistent with other evidence that temporal lobe structures contribute to the generation of the scalp-recorded P300 component and that P300 amplitude asymmetry over temporal recording sites on the scalp may reflect anatomic asymmetries in the volume of the superior temporal gyrus in schizophrenia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0048577299971688
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Frontal and inferior temporal cortical activity in visual target detection: Evidence from high spatially sampled event-related potentials (1996)
    Springer
    Brain topography 9 (1996), S. 3-14 
    Details
    ISSN: 1573-6792
    Keywords: ERP topography ; N2 ; P2 ; Selective attention ; Working memory ; Current density mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Visual event-related potential (ERP) studies show effects due to target detection in the P3 and in earlier negativities over posterior recording sites. The topography of these earlier components suggests contributions from both anterior and posterior neural generators, however these studies were performed with sparse recording arrays and may not have provided a full description of the scalp topography of the visual ERP. The current study employed a high-density recording array (64 channels) and spherical spline interpolated topographic voltage and current density maps to describe the scalp distribution of the major deflections in the visual ERP from a visual oddball paradigm: the P1, N1, N2/P2a (a temporally coincident posterior negativity and anterior positivity) and P3. A modified difference wave analysis was also performed to track the time-course of target detection effects in the ERP. Target detection effects were found in the N2/P2a and P3 components. The scalp distribution of the N2/P2a was consistent with separate frontal and posterior neural generators and this is discussed in reference to human hemodynamic and nonhuman primate studies of neural activity in the inferior temporal visual object recognition system and in frontal systems of selective attention and working memory in visual target detection tasks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01191637
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    Paper (German National Licenses)
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