The most obvious anatomical feature of our brains is the undulating surface of the cerebrum - the deep clefts are known as sulci and its folds are gyri .
人脑最明显的解剖学特征就是大脑凹凸不平的表面，其中较深的裂缝被称为脑沟而褶皱被称为脑回。
Low density of grey matter of temproral lobe , sulci narrowing or disappearance and unclear grey matter margin .
