Brain Topography. Dr. Nimir Dr. Safaa. Objectives Demarcate the major lobes, gyri and sulci of the cerebral hemisphere . Describe the organization of the cerebral hemisphere into cerebral cortex ,white matter and nuclei
To increase the surface area the cerebral cortex is thrown into folds or gyri, which are separated from each other by sulci or fissures.
White mater fibers are classified into three groups according to their connections:
Cingulumwithin cingulate gyrus connects frontal and parietal lobes to parahippocampal and temporal cortical regions.
3. Projection fibersare afferent and efferent nerve fibers passing to and from the brainstem & spinal cord to the entire cerebral cortex.