The document summarizes the functional organization and anatomy of the central nervous system (CNS). It describes how the CNS is organized hierarchically from the spinal cord up to the cerebral cortex. It also discusses the lateralized organization of the left and right hemispheres and localized organization of different brain functions. Key components of the CNS discussed include the spinal cord, brainstem, cerebellum, hypothalamus, thalamus, basal ganglia, limbic system, and cerebral cortex. The document also provides an overview of reflex arcs and their significance in assessing CNS function.