@article{Weisz2004sound-10548,
  year={2004},
  doi={10.1016/j.clinph.2003.12.034},
  title={One set of sounds, two tonotopic maps : exploring auditory cortex with amplitude-modulated tones},
  volume={115},
  journal={Clinical Neurophysiology},
  pages={1249--1258},
  author={Weisz, Nathan and Keil, Andreas and Wienbruch, Christian and Hoffmeister, S. and Elbert, Thomas}
}

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    <dcterms:title>One set of sounds, two tonotopic maps : exploring auditory cortex with amplitude-modulated tones</dcterms:title>
    <dc:creator>Elbert, Thomas</dc:creator>
    <dc:creator>Hoffmeister, S.</dc:creator>
    <dc:creator>Keil, Andreas</dc:creator>
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    <dc:contributor>Wienbruch, Christian</dc:contributor>
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    <dc:creator>Wienbruch, Christian</dc:creator>
    <dc:creator>Weisz, Nathan</dc:creator>
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    <dcterms:bibliographicCitation>Zuerst erschienen in: Clinical Neurophysiology 115 (2004) 1249 1258</dcterms:bibliographicCitation>
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    <dcterms:abstract xml:lang="eng">Objective: The possibility of simultaneously observing activation of primary and secondary auditory cortices has been demonstrated by&lt;br /&gt;Engelien et al. [Hear Res 2000;148:153 60].&lt;br /&gt;Methods: Such a dual monitoring by means of neuromagnetic recordings can be achieved when a subject is stimulated by brief pulses of&lt;br /&gt;40 Hz-modulated tones. Depending on the frequency filter applied, either the steady-state field (SSF) or the N1m can be extracted from the&lt;br /&gt;evoked magnetic field complex.&lt;br /&gt;Results: Using this  combined  (two-maps) paradigm with 4 carrier frequencies, we show that it is possible to synchronously screen two&lt;br /&gt;tonotopic maps one map each reflected either by the SSF or the N1m. Indicators are the systematic variation in the location (higher&lt;br /&gt;frequencies are more posterior) and orientation (higher frequencies oriented differently in the saggital plane) of the equivalent current dipole&lt;br /&gt;(ECD). These parameters were compared with those obtained from  classic  (one map) paradigms in which either a pure tone elicits an N1m&lt;br /&gt;or a 40 Hz continuous (3 s) stimulation produces an SSF. Overall the results were similar, however, systematic differences between the&lt;br /&gt;paradigms were found for ECD localization, dipole strength, amplitude, and phase.&lt;br /&gt;Conclusions and Significance: One possible interpretation of these results is that different tonotopically arranged cortical fields were&lt;br /&gt;involved in the generation of the components.</dcterms:abstract>
    <dcterms:issued>2004</dcterms:issued>
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    <dc:contributor>Elbert, Thomas</dc:contributor>
    <dc:language>eng</dc:language>
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    <dc:contributor>Keil, Andreas</dc:contributor>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-25T09:19:09Z</dc:date>
    <dc:contributor>Weisz, Nathan</dc:contributor>
    <dc:contributor>Hoffmeister, S.</dc:contributor>
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