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functional MRI |
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functional MRI Fast MRI Imaging A brain imaging technique that measures ↑ blood flow–BF which, like PET, relies on changes in BF and oxygenation due to brain activity; aerobic metabolism in some neurons creates a local ↑ in
deoxyHb, which triggers ↑ BF, maintaining O2 in the immediate vicinity, followed by regional ↑ in BF Neuroscience MRI fitted with special hardware to accelerate imaging speeds and advanced software that turns the static images
into movies; FM allows real-time evaluation of cerebral activity as the mind thinks, listens, dreams, and imagines. See MRI &uarr.;. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Editorial will cover such topics as structural and functional MRI, positron emission tomography, EEG and event-related potentials, and optical imaging. Using functional MRI (fMRI), a team led by Dr Deborah Yurgelun-Todd at Harvard's McLean Hospital scanned subjects' brain activity while they identified emotions on pictures of faces displayed on a computer screen (Baird et al. Functional MRI takes a rapid succession of scans that can detect small changes in the level of oxygen consumption and blood flow that take place in the areas of the brain that are active. |
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