More specifically, the main problem remains the lack of a one-to-one correspondence between specific mental processes and cortical regions. Modern neuroscientific measurement techniques that aim at extracting quantitative information about physiological functions from image-based data may offer great insights into localized brain activity for specific cognitive tasks. For example, fMRI (functional magnetic resonance imaging) noninvasively highlights potentially significant language areas by monitoring regional changes in blood oxygenation, while PET (positron emission tomography) can measure abnormalities in the patient's cerebral glucose metabolism. However, the results are highly variable from one study to the next, as there often is no single cause or pathologic mechanism, which particularly holds true for degenerative diseases. Hence, it is premature to think of functional imaging as a reliable tool to accurate diagnosis.
Format: Paperback 120 pages
13-Digit ISBN: 9783838694313