AP PSYCHOLOGY

Detailed explanation-1: -PET scan of the brain can show your actual brain function, unlike CT and MRI scans which just look at brain structure. The test involves the injection of a radioactive tracer substance through an IV line in your hand or arm.

Detailed explanation-2: -Functional magnetic resonance imaging (fMRI) measures the small changes in blood flow that occur with brain activity. It may be used to examine which parts of the brain are handling critical functions, evaluate the effects of stroke or other disease, or to guide brain treatment.

Detailed explanation-3: -fMRI is used to evaluate subtle regional blood flow changes in brain cortex that occur during patient performance of specific tasks while inside the bore of a high-field MRI scanner (generally, at a field strength of 3 Tesla).

Detailed explanation-4: -Functional magnetic resonance imaging (fMRI) is a technique for measuring and mapping brain activity that is noninvasive and safe.