An amplified recording of the waves of electrical activity that sweep across the surface of the brain is called a(n)

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An EEG (electroencephalogram) is a recording of the waves of electrical activity that sweep across the surface of the brain, amplified by electrodes placed on the scalp. fMRI (functional magnetic resonance imaging) and PET scan (positron emission tomography) measure changes in blood flow in the brain, while MRI (magnetic resonance imaging) creates images of the brain's structure.

An Amplified Recording of the Waves of Electrical Activity That