#reticular_activating_system__RAS  the network in the reticular formation that serves an alerting or arousal function
  supertype:  neural_network__neural_net  any network of neurons or nuclei that function together to perform some function in the body
  part of:  reticular_formation__reticularformation__RF  a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone
     part of:  brainstem__brain_stem__brainstem  the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus
        part of:  encephalon__brain  that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord
           part of:  central_nervous_system__centralnervoussystem__CNS__systema_nervosum_centrale  the portion of the vertebrate nervous system consisting of the brain and spinal cord
              part of:  nervous_system__nervoussystem__systema_nervosum__systemanervosum  the sensory and control apparatus consisting of a network of nerve cells
                 part of:  body__organic_structure__organicstructure__physical_structure  the entire physical structure of an organism (especially an animal or human being); "he felt as if his whole body were on fire"
           part of:  head__caput  the upper or front part of the body in animals; contains the face and brains; "he stuck his head out the window"
              part of:  animal__animate_being__animatebeing__beast__brute__creature__fauna  a living organism characterized by voluntary movement

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