Most scientists agree that the 21st century will be the "Century of Biology." The revolution that started a few decades ago with the extraordinary develop ment of molecular biology, has provided the basis for the understanding of the mechanisms that govern life through the regulation of cell function and cell-to cell interactions. Neuroscience will surely be one of the biological disciplines that will profit the most from this revolution. Neuroscience comprises the study of the brain, and the more difficult relationship of brain and behavior. It is indeed a very broad field of investigation...