The interneuron. Summation.
D000818:Animals; D001522:Behavior, Animal; D002490:Central Nervous System / Q000502:physiology*; D007395:Interneurons / Q000502:physiology*; D007448:Invertebrates; D009046:Motor Neurons / Q000502:physiology; D011689:Purkinje Cells / Q000502:physiology; D011712:Pyramidal Tracts / Q000502:physiology