S: (n) center, centre, nerve center, nerve centre (a cluster of nerve cells governing a specific bodily process) "in most people the speech center is in the left hemisphere"
S: (n) olfactory bulb (one of two enlargements at the terminus of the olfactory nerve at the base of the brain just above the nasal cavities)
S: (n) 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)
S: (n) neencephalon, neoencephalon (the part of the brain having the most recent phylogenetic origin; the cerebral cortex and related parts)
S: (n) geniculate body (one of four small oval masses that protrude slightly from the underside of the thalamus and function as synaptic centers on the way to the cerebral cortex)
S: (n) cerebrum (anterior portion of the brain consisting of two hemispheres; dominant part of the brain in humans)
S: (n) medulla oblongata, medulla, bulb (lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)) "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"
S: (n) forebrain, prosencephalon (the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube)
S: (n) hippocampus (a complex neural structure (shaped like a sea horse) consisting of grey matter and located on the floor of each lateral ventricle; intimately involved in motivation and emotion as part of the limbic system; has a central role in the formation of memories)
S: (n) cingulate gyrus, gyrus cinguli (a long curved structure on the medial surface of the cerebral hemispheres; the cortical part of the limbic system)
S: (n) telencephalon (the anterior division of the forebrain; the cerebrum and related parts of the hypothalamus)
S: (n) substantia nigra, nucleus niger, locus niger (a layer of deeply pigmented grey matter in the midbrain; associated with the striate body; is involved in metabolic disturbances associated with Parkinson's disease and with Huntington's disease)
S: (n) myelencephalon (the posterior part of the hindbrain in developing vertebrates; forms the medulla oblongata in adults)
S: (n) pons, pons Varolii (a band of nerve fibers linking the medulla oblongata and the cerebellum with the midbrain)
S: (n) brainstem, brain-stem, brain stem (the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus)
S: (n) nucleus (any histologically identifiable mass of neural cell bodies in the brain or spinal cord)
S: (n) radiation (a radial arrangement of nerve fibers connecting different parts of the brain)
S: (n) spinal cord, medulla spinalis (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)
S: (n) autonomic nervous system, ANS (the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands)