The brain imaging technique which constructs a picture of actual activity in the brain is the

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Functional magnetic resonance imaging (fMRI) is a brain imaging technique that uses a magnetic field and radio waves to construct a picture of actual activity in the brain. Electrocardiography (ECG) is a technique used to measure the electrical activity of the heart, not the brain. Magnetic resonance imaging (MRI) uses a magnetic field and radio waves to produce detailed images of the body's internal structures, but does not specifically show brain activity. Computed axial tomography (CAT) scan uses X-rays to produce cross-sectional images of the body, but again, does not specifically show brain activity.

The Brain Imaging Technique Which Constructs a Picture of Actual