Neuroscientists Take Stock of Brain-Imaging Studies

Critics say the scanning technology has confirmed past research but still is far from helping to explain how the mind works

The ability to obtain images of human-brain activity without cutting open the skull, a technology that became available to neuroscientists early in this decade, has fueled a furious pace of research, with a routine rhythm -- scan and publish, scan and publish.

Now scientists are taking a critical look at