"Microglia are like a two-edged sword," Hillard said. "When they're overactive, they make a whole bunch of nasty things that wind up killing cells like neurons."
"Glia can be divided into two categories: microglia are like the immune cells of the brain, vacuuming debris and foreign bodies; macroglia come in several flavours, and the most important of these for information processing are the astrocytes - star-shaped cells found throughout 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.