[FONT=verdana,geneva,arial]In addition to clinical evidence, brain imaging methods appear to refute the 10% brain use statement. For example, positron emission tomography (PET) scans show that much of the brain is active during many different tasks. Often when brain scans are published, they have been manipulated to show relative amounts of brain activity rather than absolute activity. This graphical presentation of the data shows differences in brain activity. Therefore, it may appear that some areas of the brain are inactive when, in fact, they were active, but at a lower level compared to other sites. Brain scans only show activity for the carefully designed isolated tasks being tested, such as memory or visual processing. They do not show activity related to other untested abilities. Imagine the brain is a restaurant kitchen. If you looked in on the kitchen at one time, you may see the chef preparing salad. However, you may not know that the main course is cooking in the oven. Similarly, if you image the brain during a visual task, you will not see the other patterns of activity associated with performing different (simultaneous) tasks.[/FONT]