Delta wave MRI - fMRI imaging of electrophysiological activity.

Autor:	Berman JI; 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)., Bloy L; 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)., Ward S; 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)., Roberts TPL; 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).
Jazyk:	angličtina
Zdroj:	AJNR. American journal of neuroradiology [AJNR Am J Neuroradiol] 2024 Dec 09. Date of Electronic Publication: 2024 Dec 09.
DOI:	10.3174/ajnr.A8618
Abstrakt:	We propose a novel application of MR encephalography (MREG) to detect the frequency spectrum of endogenous slow oscillatory brain activity (delta, <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.ABBREVIATIONS: MREG: Magnetic resonance encephalography BOLD: Blood oxygen level dependent. (© 2024 by American Journal of Neuroradiology.)
Databáze:	MEDLINE
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