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In medicine, magnetic resonance imaging (MRI) uses powerful magnetic fields and radio waves to show what's happening inside the body, producing dynamic images of our internal organs. Using similar technology that tracks blood flow, functional magnetic resonance imaging (fMRI) scans can show neuroscientists neural activity, indicating what parts of the brain light up when, for instance, a person thinks of an upsetting memory or starts craving cocaine . Both require staying within a massive MRI machine for the length of the scan. There's some controversy over how scientists interpret fMRI data in particular—fMRI studies are based on the idea that an increase of blood flow to a region of t... Читать полностью

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