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.achygyria (meaning thick or fat gyri) is a congenital malformation of the cerebral hemisphere, resulting in unusually thick gyri in the cerebral cortex. Pachygyria is used to describe brain characteristics in association with several neuronal migration disorders; most commonly relating to lissencephaly.
Zhang Wei appears to be the most common full name in the world. This was stated in a Beijing News article, One Name 'Zhang Wei' Covers 290,000 People, 26 Jul 2007. Mohammed is the most common first name in the world. According to the sixth edition of The Columbia Encyclopedia (2000), Muhammad is probably the most common given name in the world, including variations. It is estimated that more than 15 million people in the world bear the name Muhammad.
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