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| Noun | 1. | systema nervosum centrale - the portion of the vertebrate nervous system consisting of the brain and spinal cordsystem - a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion" glia, neuroglia - sustentacular tissue that surrounds and supports neurons in the central nervous system; glial and neural cells together compose the tissue of the central nervous system brain, encephalon - that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord corticospinal tract, pyramidal motor system, pyramidal tract - any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral root of the spinal cord medulla spinalis, spinal cord - a major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain; a long tubelike structure extending from the base of the brain through the vertebral canal to the upper lumbar region |