  the cerebrum (latin for brain) refers to the parts of the brain containing the cerebral cortex (of the two cerebral hemispheres), as well as several subcortical structures, including the hippocampus, basal ganglia, and olfactory bulb. in humans, the cerebrum is the superior-most region of the central nervous system (cns). the telencephalon refers to the embryonic structure from which the mature cerebrum develops. in mammals, the dorsal telencephalon, or pallium, develops into the cerebral cortex, and the ventral telencephalon, or subpallium, becomes the basal ganglia. the cerebrum is also divided into approximately symmetric left and right cerebral hemispheres. with the assistance of the cerebellum, the cerebrum controls all voluntary actions in the body. == structure ==  thumb|surface of the cerebrum|250 px|left thumb|medial surface of the cerebral hemispheres|250 px|left the cerebrum is composed of the following regions: * cerebral cortex, or cortices of the cerebral hemispheres * basal ganglia, or basal nuclei * limbic system thumb|location of the human cerebrum (red). the cerebrum comprises the largest part of the brain. it lies in front or on top of the brainstem and in humans is the largest and best-developed of the five major divisions of the brain. the cerebrum is the newest structure in the phylogenetic sense, with mammals having the largest and best-developed structures among all species. in larger mammals, the cerebral cortex is folded into many gyri (ridges) and sulci (furrows), 
Cerebrum