Oxy­gen re­veals ac­tiv­ity

Science Illustrated - - HUMANS/ THE BRAIN -

The test sub­jects read out sen­tences, as a fMRI scan­ner mea­sures the blood flow of the brain. Ac­tive brain re­gions con­sume more oxy­gen and en­ergy as they re­ceive more blood.

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