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The lateral sulcus (also called Sylvian fissure or lateral fissure) is one of the most prominent structures of the human brain. ==Anatomy== The lateral sulcus divides both the frontal lobe and parietal lobe above from the temporal lobe below. It's in both hemispheres of the brain but is longer in the left hemisphere in most people. The lateral sulcus is one of the earliest-developing sulci of the human brain. It first appears around the fourteenth gestational week. The lateral sulcus has a number of side branches. Two of the most prominent and most regularly found are the ascending (also called vertical) ramus and the horizontal ramus of the lateral fissure, which subdivide the inferior frontal gyrus. The lateral sulcus also contains the transverse temporal gyri, which are part of the primary and below the surface auditory cortex. Partly due to a phenomenon called Yakovlevian torque, the lateral sulcus is often longer and less curved on the left hemisphere than on the right. It is also located near Sylvian Point. The area lying around the Sylvian fissure is often referred to as the perisylvian cortex.〔Courten Norbury: ''Understanding Developmental Language Disorders: From Theory to Practice'' 2008, p. 63〕 The human secondary somatosensory cortex (S2, SII) is a functionally-defined region of cortex in the parietal operculum on the ceiling of the lateral sulcus. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「The lateral sulcus (also called Sylvian fissure or lateral fissure) is one of the most prominent structures of the human brain.==Anatomy==The lateral sulcus divides both the frontal lobe and parietal lobe above from the temporal lobe below. It's in both hemispheres of the brain but is longer in the left hemisphere in most people. The lateral sulcus is one of the earliest-developing sulci of the human brain. It first appears around the fourteenth gestational week.The lateral sulcus has a number of side branches. Two of the most prominent and most regularly found are the ascending (also called vertical) ramus and the horizontal ramus of the lateral fissure, which subdivide the inferior frontal gyrus. The lateral sulcus also contains the transverse temporal gyri, which are part of the primary and below the surface auditory cortex.Partly due to a phenomenon called Yakovlevian torque, the lateral sulcus is often longer and less curved on the left hemisphere than on the right.It is also located near Sylvian Point.The area lying around the Sylvian fissure is often referred to as the perisylvian cortex.Courten Norbury: ''Understanding Developmental Language Disorders: From Theory to Practice'' 2008, p. 63The human secondary somatosensory cortex (S2, SII) is a functionally-defined region of cortex in the parietal operculum on the ceiling of the lateral sulcus.」の詳細全文を読む スポンサード リンク
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