BRAIN

A mass of nervous tissue in the skull; the main part of the central nervous system, the primary center for regulating body activities. The brain includes the two hemispheres of the cerebrum, the cerebellum, the pons, and the medulla oblongata, each part with specialized functions. The brain is covered by protective membranes and contains cavities containing cerebrospinal fluid.

The two videos below tell two different stories of something that has gone wrong. Do some research and describe what you think has happened.