Myalgia is not a medical disorder or disease but more of a symptom of an existing underlying condition. Myalgia is known as a muscle ache or muscle pain. It is a common condition that almost everyone has had at one time or another.
Gyri and Sulci. Gyri and Sulci are compliments of each other in the sense that they help create each other. The gyri (single gyrus) are the actual pieces of the brain's cerebrum which have been smooshed and curved into fine folds so that more surface area is available on the cerebrum. Sulci are the shallow grooves which are formed between these smooshed folds.
Structure [edit]. Sulci are one of three parts of the cerebral cortex, the others being the gyri and the fissures. The three different parts create a larger surface area for the human brain and other mammalian brains. When looking at the human brain, two-thirds of the surface is hidden in the grooves.The sulci and fissures are both grooves in the cortex but they are differentiated by size. A sulcus is a shallower groove that surrounds a gyrus.ulci are one of three parts of the cerebral cortex, the others being the gyri and the fissures. The three different parts create a larger surface area for the human brain and other mammalian brains.