Human Brain. 3d animation image showing the anatomical structure of the human brain rotating through 360 degrees. Structures seen include the cerebrum, the interhemispheric fissure, which separates the two hemispheres of the cerebrum, the cerebellum (striped structures at base of brain) and the brainstem (stalk at bottom centre). Sulci and gyri form the characteristic folds or convolutions of the cerebral cortex.