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Applications of MEG include basic research into perceptual and cognitive brain processes, localizing regions affected by pathology before surgical removal, determining the function of various parts of the brain, and neurofeedback.This can be applied in a clinical setting to find locations of abnormalities as well as in an experimental setting to simply measure brain activity.
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Instead of using magnetic resonance or X-rays, PET scans rely on positron emitting markers that are bound to a biologically relevant marker such as glucose.
The more activation in the brain the more that region requires nutrients, so higher activation appears more brightly on an image of the brain.
Functional MRI allows researchers to draw associative relationships between different loci and regions of the brain and provides a large amount of knowledge in establishing new landmarks and loci in the brain.
While many of the functions of CT scans are now done using MRI, CT can still be used as the mode by which brain activation and brain injury are detected.
Using an X-ray, researchers can detect radioactive markers in the brain that indicate brain activation as a tool to establish relationships in the brain as well as detect many injuries/diseases that can cause lasting damage to the brain such as aneurysms, degeneration, and cancer.
Positron emission tomography (PET) is another imaging technology that aids researchers.
PET scans are becoming more frequently used by researchers because PET scans are activated due to metabolism whereas MRI is activated on a more physiological basis (sugar activation versus oxygen activation).
Transcranial magnetic stimulation (TMS) is essentially direct magnetic stimulation to the brain.
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