SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY SPRINGER MEDIZIN / SCIENCE PHOTO LIBRARY
Central nervous system. Computer artwork showing the brain, cranial nerves and the top portion of the spinal cord. At centre left is one of the optic nerves (yellow). Above the spinal cord is the brainstem, which controls automatic functions, sleep and arousal and relays messages from the brain to the spinal cord. The striped structure either side of the brainstem is the cerebellum, which controls muscle coordination and balance.
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