Physiology: Summary

• increase in rCMRglu (20 ? 40%)

  • seems to be mostly oxidative

• increase in rCMRO2 (5 ? 25%)

  • oxygen transport limited, but coupled: recent MR data suggests ?CMRO2: ?CBF = 1:2

• increase in rCBF (20 ? 70%)

  • through increases in velocity rather than capillary recruitment

• increase in rCBV (5 ? 30%)

  • mostly in venous vessels

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