Described is the discovery that oscillations of electric potential at 40 hertz hold the key to how the brain assembles sense impressions into a single object. Potential implications from this research are discussed. (CW)

Describes the use of brain models to connect the microscopic level accessible by molecular and cellular techniques with the systems level accessible by the study of behavior. Discusses classes of brain models, and specific examples of such models. Evaluates the strengths and weaknesses of using brain modelling to understand human brain function.…