What does it tell us?
Since functional MRI scans identify clearly and specifically
However, observing these functions requires great precision. Observing differences in blood flow between active areas and less active areas requires "seeing" very small changes (1- 4%). These small differences require that we use statistical analyses of these images to produce reliable results. The large number of images acquired during each session (500-1200 images) necessitates significant effort, manpower, hardware, software, as well as digital storage, to process and analyze these results. These tasks demand image co-registration, mathematical correction for motion and other potential artifactual errors, and require state-of-the-art knowledge to produce reliable and valid results.
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