THE MACARTHUR FOUNDATION RESEARCH NETWORK ON LAW AND NEUROSCIENCE WHAT IS fMRI?
نویسنده
چکیده
fMRI does not measure neural activity directly. Instead, it measures small and variable changes in the ratio of oxygenated to deoxygenated blood in the brain when a particular task is performed or stimulus presented—the so-called BOLD, or blood oxygen level-dependent, response. Firing neurons, like working muscles, require oxygen; follow the trail of oxygenated hemoglobin, and you find neural activity.
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