ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Normal brain. Coloured magnetic resonance imaging (MRI) scan of an axial section through a healthy brain. The front of the brain is towards top of the image. Seen here is the cerebrum, the largest part of the brain. It is divided into two cerebral hemispheres and is responsible for conscious thought, emotion and voluntary movement.
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