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Brain Imaging Measures More Than We Think

January 21, 2009

Popular brain-imaging techniques may be painting a misleading picture of brain activity, according to a new study.

Scientists using techniques such as functional magnetic resonance imaging (fMRI) make the assumption that blood flow into a particular brain region is directly linked to the amount of activity in the cells of that region. This is because active cells need more oxygen, and blood ferries it to them.

But a study by Aniruddha Das and Yevgeniy Sirotin at Columbia University in New York shows that this is not necessarily the case.

Read more at NatureNews">Read more at NatureNews


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