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- W2039090332 abstract "The effect of carbon dioxide (CO 2 ) on cerebral metabolism is of tremendous interest to functional imaging. In particular, mild-to-moderate hypercapnia is routinely used in calibrated blood oxygen-level dependent (BOLD)-functional magnetic resonance imaging (fMRI)-based quantification of cerebral oxidative metabolism changes (ΔCMRO 2 ), and relies on the assumption of a stable CMRO 2 during CO 2 challenges. However, this assumption has been challenged by certain animal studies, necessitating its verification in humans and under conditions customary to fMRI. We report, for the first time, on global ΔCMRO 2 measurements made noninvasively in humans during graded hypercapnia and hypocapnia. We used computerized end-tidal CO 2 modulation to minimize undesired concurrent changes in oxygen pressure, and our findings suggest that no significant change in global CMRO 2 is expected at the levels of end-tidal CO 2 changes customary to calibrated BOLD." @default.
- W2039090332 created "2016-06-24" @default.
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- W2039090332 date "2010-04-07" @default.
- W2039090332 modified "2023-10-17" @default.
- W2039090332 title "Global Cerebral Oxidative Metabolism during Hypercapnia and Hypocapnia in Humans: Implications for BOLD fMRI" @default.
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- W2039090332 doi "https://doi.org/10.1038/jcbfm.2010.42" @default.
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