Pondering the Construction and Repair of the Brain with Jeffrey Macklis

Professor Jeffrey Macklis of Harvard University describes how different types of neurons in the cerebral cortex arise from progenitor [stem] cells and how those neurons grow and make highly specific connections with other neurons.. His findings in animal models have shown that it is possible to replace neurons lost as a result of traumatic injury or neurodegenerative conditions such as ALS and Alzheimer's disease.