| | Conditions & Treatments | Brain & Nervous System Is the brain part of CNS or PNS? The brain is part of the central nervous system (CNS). The CNS is composed of the brain and the spinal cord. Brain & Nervous System - Related Articles What Is Pervasive Development Disorder? What is encroachment upon the neural foramen? How much information can the brain hold? Does Repetition Improve Memorization? How to Stop Parkinson's Tremors The nervous system has two distinct branches They are the? Spinal Nerves Vs. Medial Nerves