Conversation so far:
which part of the cns is made up of the midbrain
The brainstem consists of the medulla, the pons and the midbrain.
what percentage of the brain is the brainstem
The brainstem is a very small component of the brain, making up only around 2.6 percent of the total weight of the brain.

Question: why is the part important
Self-contained rewrite: why is the brain stem important