@article{Schupp1994Neuro-10666,
  year={1994},
  doi={10.1016/0926-6410(94)90004-3},
  title={Neurophysiological differences between perception and imagery},
  number={2},
  volume={2},
  issn={0926-6410},
  journal={Cognitive Brain Research},
  pages={77--86},
  author={Schupp, Harald T. and Lutzenberger, Werner and Birbaumer, Niels and Miltner, Wolfgang and Braun, Christoph}
}

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    <dc:creator>Braun, Christoph</dc:creator>
    <dc:contributor>Birbaumer, Niels</dc:contributor>
    <dc:creator>Miltner, Wolfgang</dc:creator>
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    <dc:contributor>Schupp, Harald T.</dc:contributor>
    <dc:creator>Lutzenberger, Werner</dc:creator>
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    <dcterms:abstract xml:lang="deu">The present study was designed to examine brain activity underlying mental imagery is conceptualized as behavior guided by internal representation only, the activity of the prefrontal lobes was assumed to be a measure of differentiation of imagery from perception. Twenty-one subjects were requested to observe and imagine a swinging pendulum and to touch and imagine a coshball in separate trials. The EEG was recorded from 15 standard electrode sites and analyzed with (1) traditional alpha power and (2) an estimation of dimensional complexity (a measure derived from nonlinear dynamics). Both EEG measures revealed expected object-related differences during perception as well as during imagery. The visual pendulum showed relative to the tactile coshball increased dimensional complexity and less alpha power at parietal and frontal sites. However, only the EEG dimension supported the main hypothesis: Imagery resulted in increased prefrontal dimensional complexity in comparison to perception independent of the modality of the image. In contrast, for alpha power the difference between imagery and perception was due to stimulus modality.</dcterms:abstract>
    <dc:contributor>Miltner, Wolfgang</dc:contributor>
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    <dc:contributor>Braun, Christoph</dc:contributor>
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    <dcterms:title>Neurophysiological differences between perception and imagery</dcterms:title>
    <dcterms:bibliographicCitation>Cognitive Brain Research ; 2 (1994). - S. 77-86</dcterms:bibliographicCitation>
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