In adult mammals, including humans, the subventricular zone （SVZ） of the lateral ventricles and the subgranular zone of the dentate gyms （DG） show ongoing neurogenesis. Cerebral ischemic insults trigger neurogenes...In adult mammals, including humans, the subventricular zone （SVZ） of the lateral ventricles and the subgranular zone of the dentate gyms （DG） show ongoing neurogenesis. Cerebral ischemic insults trigger neurogenesis from neural stem cells or progenitor cells located in the SVZ and DG. Newborn neurons are then functionally recruited into the circuitry of the CA1 region, striatum and DG granule cell layer.展开更多
There are about 9,000 species of birds living in the world. They have a more or less intimate association with human life. Birds are the only vertebrates that have dwelled throughout in the air, water and land. Unfort...There are about 9,000 species of birds living in the world. They have a more or less intimate association with human life. Birds are the only vertebrates that have dwelled throughout in the air, water and land. Unfortunately, little do we understand of their origins and evolutionary history. This is largely due to the poor preservation of the fossil ancestry. Like their modem descendants, the early ancestors had both an extensive range of life spans and very thin skeletons.展开更多
文摘In adult mammals, including humans, the subventricular zone （SVZ） of the lateral ventricles and the subgranular zone of the dentate gyms （DG） show ongoing neurogenesis. Cerebral ischemic insults trigger neurogenesis from neural stem cells or progenitor cells located in the SVZ and DG. Newborn neurons are then functionally recruited into the circuitry of the CA1 region, striatum and DG granule cell layer.
文摘There are about 9,000 species of birds living in the world. They have a more or less intimate association with human life. Birds are the only vertebrates that have dwelled throughout in the air, water and land. Unfortunately, little do we understand of their origins and evolutionary history. This is largely due to the poor preservation of the fossil ancestry. Like their modem descendants, the early ancestors had both an extensive range of life spans and very thin skeletons.
