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gyrus
In neuroanatomy, a gyrus (pl. ''gyri'') is a ridge on the cerebral cortex. It is generally surrounded by one or more sulci (depressions or furrows; sg. ''sulcus''). Gyri and sulci create the folded appearance of the brain in humans and other mammals.
==Structure==
The gyri are part of a system of folds and ridges that create a larger surface area for the human brain and other mammalian brains.〔
〕 Because the brain is confined to the skull, brain size is limited. Ridges and depressions create folds allowing a larger cortical surface area, and greater cognitive function, to exist in the confines of a smaller cranium.〔Cusack, R. (2005). The intraparietal sulcus and perceptual organization. Journal of Cognitive Neuroscience, 17(4), 641-651. doi: 10.1162/0898929053467541〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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