ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Brain implants for Parkinson's disease. Coloured 3D magnetic resonance imaging (MRI) scan of the brain of a patient who has had an electrode (white line) inserted into the brain. The electrodes stimulate the brain to help to control the tremors associated with Parkinson's. The brain has been overlaid on an X-ray of the skull.
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