neuropile

/ˈnʊroʊˌpaɪl/
noun
  1. A dense network of nerve fibers and synapses in the central nervous system, especially in the brain.
    • The neuropile is where most of the communication between neurons happens.
    • Damage to the neuropile can affect memory and movement.
    • Scientists studied the neuropile to understand how signals travel in the brain.