As you might think, bacterial infections are caused by bacteria, and viral infections are caused by viruses. Perhaps the most important distinction between bacteria and viruses is that antibiotic drugs usually kill bacteria, but they aren't effective against viruses.s you might think, bacterial infections are caused by bacteria, and viral infections are caused by viruses. Perhaps the most important distinction between bacteria and viruses is that antibiotic drugs usually kill bacteria, but they aren't effective against viruses.
What is the bump in the cortex called? The bump in the cortex is called the gyrus. It is the convex fold in the surface of the brain and surrounded by one or more sulci.
Superficial gray matter of the cerebral hemisphere is called cerebral cortex (most of the cortex is neocortex, in contrast to old paleocortex of the piriform lobe). The cortical surface features sulci (grooves) and gyri (ridges).erebral white matter contains fibers that connect neighboring or distant gyri, fibers that communicate between hemispheres, and fibers that connect the hemisphere with the brainstem. The corpus callosum is a mass of fibers that connect right and left cerebral hemispheres.