Brain scanning techniques (sakshi)

EEG (electroencephalogram)
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PET scans (positron emission tomography)Radioactive glucose injected into bloodstream, brain requires glucose for active areas so more active means more glucose neededAdvantages of PET scansMeasures the brain in action, reveals chemical info that other scans can't e.g can distinguish between a benign and malignant tumour, can measure the effect of neurotransmitters on mental healthDisadvantages of PET scansCostly, injection so ethical issues, radioactive glucose so limited uses, less accurate than MRI because brain is always active