The Catalepsean Node is the 6th of the 19 gene-seed organs that are implanted into a Space Marine Neophyte to produce a new Astartes. This organ is implanted into the back of the cerebrum, just above the brain stem. When deprived of sleep for a long period of time, the Catalepsean Node "cuts in" upon detecting a rise in the Astartes' stress and fatigue hormones. This allows the Astartes to consciously "switch off" sections of the brain sequentially, while remaining awake and alert. This ability comes at a price, as prolonged use of this ability can be hazardous, possibly inducing hallucinations or even psychosis. This implant bears a resemblance to an ancient scientific theory as to how ceteaceans known as "Bottlenose Dolphins" "sleep": shutting off sections of their brain while remaining