HANK MORGAN / SCIENCE PHOTO LIBRARY HANK MORGAN / SCIENCE PHOTO LIBRARY
Brain-hand control from MEG scan. Computer image of a human brain in side view, depicting brain to hand nerve control. Colour-coded squares on the cerebrum correspond to nerve areas associated with finger movement. At centre (magenta) is a brain tumour. These nerve motor areas of the brain were located by magnetoencephalography (MEG), a brain scanning technique that measures magnetic fields generated from nerve activity in the brain. By knowing which brain areas are responsible for body function, a surgeon can remove a tumour without damaging important sites in the brain. This brain image was constructed from MRI scan data. Photo- graphed at New York University Medical Centre USA.
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