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The cerebral metabolic rate of oxygen (CMRO2) is an important measure of brain function. Since it is challenging to measure directly, especially dynamically, a number of neuroimaging techniques aim to infer activation-induced changes in CMRO2 from indirect data. Here, we employed a mathematical modelling approach, based on fundamental biophysical… (More)
Variations in local neural activity are accompanied by rapid, focal changes in cerebral blood flow and volume. While a range of observations have shown that dilation occurs in cerebral arteries, there is conflicting evidence about the significance of volume changes in post-arteriole vessels. Here, we reconcile the competing observations using a new… (More)