Neuroscience is one of the fastest growing scientific fields in terms of the numbers of scientists and the knowledge being gained. In recent years, both the scope of neuroscience and the methodologies employed by neuroscientists have broadly expanded, from biochemical and genetic analysis of individual nerve cells and their molecular constituents, to the imaging of brain structure and function. Perhaps the most significant recent neuroscientific achievement is the ability of neuroimaging technologies, including functional magnetic resonance imaging (fMRI), to image brain function. Clinicians and scientists use fMRI not only to map sensory, motor, and cognitive function, but also to study the neural correlates of a range of physical and ment...