Researchers validate, extend fMRI research on brain activity

Like a motorist who knows that the "check engine" light indicates something important but ill-defined is happening, neuroscientists have relied heavily on an incompletely understood technology called functional magnetic resonance imaging to show them what the brain is doing when people respond to different stimuli. The non-invasive technology offers a window into the physiology of human cognition and emotion, but - without a satisfying explanation of how some common fMRI signals are produced - the ability of researchers to draw conclusions has been limited.

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