👉 The term "mesial" is a medical term used to describe an area of the brain that is located in the middle of the frontal lobe, which is one of the two hemispheres of the brain. This region is responsible for processing visual and auditory information, as well as controlling motor functions such as speech and movement. The mesial part of the brain is often referred to as the "middle" or "central" part because it is located in this area during development and growth.