Transient functional blood flow change in the human brain measured noninvasively by diffusing-wave spectroscopy

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2009
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Optics letters ; 33 (2009), 19. - pp. 2233-2235. - ISSN 0146-9592. - eISSN 1539-4794
Abstract
Multispeckle diffusing-wave spectroscopy (DWS) is used to measure blood flow transients in the human visual cortex following stimulation by 7.5 Hz full-field and checkerboard flickering. The average decay time τd characterizing the decay of the DWS autocorrelation function shows a biphasic behavior; within about 2 s after stimulation onset, τd increases rapidly to about 6% above the baseline value. At later times, τd slowly decreases and reaches a steady-state value about 5% below the baseline value after about 15 s. The initial increase of the DWS signal suggests a transient reduction of the cortical blood flow velocity shortly after stimulation onset. Measurements of this transient response at different positions over the primary visual cortex show a spatial pattern different from the one measured by electroencephalography.
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530 Physics
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Blutfluß,Gehirn,nicht invasive Messung,blood flow change,diffusing-wave spectroscopy,brain
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Cite This
ISO 690LI, Jun, Markus NINCK, Leonie KOBAN, Thomas ELBERT, Johanna KISSLER, Thomas GISLER, 2009. Transient functional blood flow change in the human brain measured noninvasively by diffusing-wave spectroscopy. In: Optics letters. 33(19), pp. 2233-2235. ISSN 0146-9592. eISSN 1539-4794. Available under: doi: 10.1364/OL.33.002233
BibTex
@article{Li2009Trans-9509,
  year={2009},
  doi={10.1364/OL.33.002233},
  title={Transient functional blood flow change in the human brain measured noninvasively by diffusing-wave spectroscopy},
  number={19},
  volume={33},
  issn={0146-9592},
  journal={Optics letters},
  pages={2233--2235},
  author={Li, Jun and Ninck, Markus and Koban, Leonie and Elbert, Thomas and Kissler, Johanna and Gisler, Thomas}
}
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    <dcterms:abstract xml:lang="eng">Multispeckle diffusing-wave spectroscopy (DWS) is used to measure blood flow transients in the human visual cortex following stimulation by 7.5 Hz full-field and checkerboard flickering. The average decay time τd characterizing the decay of the DWS autocorrelation function shows a biphasic behavior; within about 2 s after stimulation onset, τd increases rapidly to about 6% above the baseline value. At later times, τd slowly decreases and reaches a steady-state value about 5% below the baseline value after about 15 s. The initial increase of the DWS signal suggests a transient reduction of the cortical blood flow velocity shortly after stimulation onset. Measurements of this transient response at different positions over the primary visual cortex show a spatial pattern different from the one measured by electroencephalography.</dcterms:abstract>
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