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Similarities and Differences: fMIR scan and animal model

Can you tell me two similarities and two differences between the fMRI scan and an animal model?

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fMRI (functional Magnetic Resonance Imaging) is a technique for non-invasively imaging brain activation. It's based on detecting the change in oxygenated blood associated with neural firing (when neurons are active, they demand a greater blood flow to be delivered by the neighbouring blood vessels).

Since it is a painless, non-invasive procedure, it is possible to use human subjects for testing, whereas previous methods for determining brain ...