That part of the nervous system in vertebrates derived from the neural tube consisting of the brain (prosencephalon, mesencephalon, rhombencephalon) and cerebral ganglia, together with the retina (sometimes considered to be part of the peripheral system), spinal cord, and meninges. Anything else is considered to be the peripheral nervous system. It consists of two regions: gray matter and white matter.
See Activation (in a connectionist model),, Alpha (α) motoneuron, Astrocyte, Autonomic nervous system (ANS), Brain (or encephalon), Diencephalon, Ganglia, Gray matter, Meninges, Mesencephalic reticular activating system, Mesencephalon, Microtubules, Myelin, Neural tube, Parasympathetic nervous system (PNS), Peripheral nervous system (PNS), Prosencephalon, Retina, Rhombocephalon, Sympathetic nervous system (SNS), Telencephalon, Somatic nervous system, Spinal cord, White matter