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.
The Cerebral Cortex. This is the outer covering of the brain, the one with all the bumps (gryi or the singular gyrus) and folds (sulci or the singular sulcus). The cortex has a large number of connections â 75% in total.The other 25% of connections link to other brain regions, such as the nervous system.he Cerebral Cortex. This is the outer covering of the brain, the one with all the bumps (gryi or the singular gyrus) and folds (sulci or the singular sulcus). The cortex has a large number of connections â 75% in total.