From BEAM Robotics Wiki
From biology, more generally called the ‘‘’Reticular Formation’’’ The term refers to one of the oldest portions of the brain, which is situated at the core of the brainstem. It governs approximately 25 behaviors and autonomic functions including the waking/sleeping cycle, eating, elimination of bodily waste, etc.
It is crucial for maintaining the state of consciousness., is believed to be the center of motivation in mammals(including humans) and is involved in the filtering incoming sensory stimuli to discriminate between relevant and background stimuli.
The term is used in the paper “Living Machines” written by Mark Tilden and Brosl Hasslacher where it refers to a Process Neutralizing Circuit as being “an analogy to the biological mechanism found in living nervous systems that regulate excessive involuntary actions”.
 External References
- Wikipedia article: Reticular formation
- Wikipedia article: Reticular activating system
- THE BRAIN STRUCTURES THAT WAKE YOU UP AND PUT YOU TO SLEEP