The large prefrontal cortex was not considered important for many years. Now, we know that it is the critical brain link to thoughts and behaviors related to organization and goals. With the large numbers of traumatic brain injury, understanding the frontal lobes has become increasingly important. Imaging research has revised our understanding of these regions. But, with the limitations of imaging (see the Limits of Current Neuroscience), most information, in fact, has been gleaned from studies of patients with brain damage.