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.
These series of convolutions called gyri (singular, gyrus) are perhaps the most distinguishing feature of the external cerebral surface. Between them are grooves of varying depth called sulci (singular, sulcum) or fissures. The frontal lobe is crossed over by three sulci, which divide the frontal lobe into four gyri. The three sulci are the precentral, superior frontal, and inferior frontal sulci and the four gyri are ... Click to read more below. The inferior frontal gyrus is one of four such gyri in the frontal lobe.