*Gyrus(gyri)-is a ridge on the cerebral cortex. Folds on the brain material. Many ridges called convolutions, or gyri, or gyrus, separated by grooves, mark the cerebrum's surface. *Sulcus(sulci)- shallow grooves on the brain.Generally, a shallow to somewhat deep groove is called a sulcus, or sulci, and a very deep groove is called a fissure.1  2 cerebral hemispheres:olds on the brain material. Many ridges called convolutions, or gyri, or gyrus, separated by grooves, mark the cerebrum's surface. *Sulcus(sulci)- shallow grooves on the brain. Generally, a shallow to somewhat deep groove is called a sulcus, or sulci, and a very deep groove is called a fissure. 1  2 cerebral hemispheres:
Most common pointing device on a notebook? The most common now is the touch pad. Prior to the touch pad, a stick pointer that looked much like a pencil eraser was more common; but the touch pad became more popular. Making the world better, one answer at a time.
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