ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Brain scans. Magnetic resonance imaging (MRI) scans of axial (horizontal) sections through a healthy brain. The front of the brain is towards top left. 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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