"An individual's brain stem is like an secretary of a major corporation. It relays information that is important so that the rest of the brain can function properly."
The linked page is a discussion of strokes and how they affect different part of the brain.
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.