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<meta name="DC.Description" content="ABSTRACT We propose a novel application of MR encephalography (MREG) to detect the frequency spectrum of endogenous slow oscillatory brain activity (delta, &lt;4 Hz)[1]. MREG offers faster image acquisition than conventional fMRI and superior spatial localization than EEG/MEG. MREG was acquired at 0.1 s temporal resolution in a healthy adult during interleaved wakefulness and sleep to demonstrate its capability for detecting delta-band power changes associated with sleep [2] previously demonstrated by electroencephalography (EEG). For each voxel, the brain activity MREG signal was used to compute a spectrogram and whole brain image of delta-band spectral power. Delta-band power was observed to increase during sleep as compared to awake states using measures from MREG voxel-wise spectrograms and sequential whole brain spatial maps of slow wave power. This work introduced an MR technique for measuring brain slow wave activity which is sensitive to changes in the magnitude and frequency of brain activity in sleep.

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&lt;p&gt;We propose a novel application of MR encephalography (MREG) to detect the frequency spectrum of endogenous slow oscillatory brain activity (delta, &amp;lt;4 Hz)[1]. MREG offers faster image acquisition than conventional fMRI and superior spatial localization than EEG/MEG. MREG was acquired at 0.1 s temporal resolution in a healthy adult during interleaved wakefulness and sleep to demonstrate its capability for detecting delta-band power changes associated with sleep [2] previously demonstrated by electroencephalography (EEG). For each voxel, the brain activity MREG signal was used to compute a spectrogram and whole brain image of delta-band spectral power. Delta-band power was observed to increase during sleep as compared to awake states using measures from MREG voxel-wise spectrograms and sequential whole brain spatial maps of slow wave power. This work introduced an MR technique for measuring brain slow wave activity which is sensitive to changes in the magnitude and frequency of brain activity in sleep.&lt;/p&gt;&lt;p&gt;ABBREVIATIONS: MREG: Magnetic resonance encephalography BOLD: Blood oxygen level dependent&lt;/p&gt;" />
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<meta name="twitter:description" content="ABSTRACT We propose a novel application of MR encephalography (MREG) to detect the frequency spectrum of endogenous slow oscillatory brain activity (delta, &lt;4 Hz)[1]. MREG offers faster image acquisition than conventional fMRI and superior spatial localization than EEG/MEG. MREG was acquired at 0.1 s temporal resolution in a healthy adult during interleaved wakefulness and sleep to demonstrate its capability for detecting delta-band power changes associated with sleep [2] previously demonstrated by electroencephalography (EEG). For each voxel, the brain activity MREG signal was used to compute a spectrogram and whole brain image of delta-band spectral power. Delta-band power was observed to increase during sleep as compared to awake states using measures from MREG voxel-wise spectrograms and sequential whole brain spatial maps of slow wave power. This work introduced an MR technique for measuring brain slow wave activity which is sensitive to changes in the magnitude and frequency of brain activity in sleep.

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    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">Jeffrey I. Berman</span>, <span class="highwire-citation-author" data-delta="1">Luke Bloy</span>, <span class="highwire-citation-author" data-delta="2">Shana Ward</span> and <span class="highwire-citation-author" data-delta="3">Timothy P.L. Roberts</span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">December 2024,  </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">ajnr.A8618; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata">DOI: https://doi.org/10.3174/ajnr.A8618 </span></div>
  
  
  
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<div id="hw-article-author-popups-top-node-112252--6145573968" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">Jeffrey I. Berman </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'>Program in Advanced Imaging Research and Department of Radiology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA (JI Berman, L Bloy, S Ward, TPL Roberts) Department of Radiology, University of Pennsylvania, Philadelphia, PA, USA (JI Berman, TPL Roberts)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=Jeffrey%2BI.%2BBerman%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Berman%20JI&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AJeffrey%2BI.%2BBerman%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-1"><div class="author-tooltip-name">Luke Bloy </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'>Program in Advanced Imaging Research and Department of Radiology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA (JI Berman, L Bloy, S Ward, TPL Roberts) Department of Radiology, University of Pennsylvania, Philadelphia, PA, USA (JI Berman, TPL Roberts)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=Luke%2BBloy%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Bloy%20L&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3ALuke%2BBloy%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-2"><div class="author-tooltip-name">Shana Ward </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'>Program in Advanced Imaging Research and Department of Radiology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA (JI Berman, L Bloy, S Ward, TPL Roberts) Department of Radiology, University of Pennsylvania, Philadelphia, PA, USA (JI Berman, TPL Roberts)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=Shana%2BWard%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Ward%20S&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link last"><a href="/search/author1%3AShana%2BWard%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-3"><div class="author-tooltip-name">Timothy P.L. 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