LANGUAGE AND BRAIN ACTIVITIES - ON THE USE OF IMAGING METHODS TO IDENTIFY COGNITIVE-PROCESSES

The use of imaging methods to identify cognitive processes has led to controversial results. Studies designed to isolate a given cognitive p rocess show activation in nonoverlapping cortical areas. By borrowing an example from single cell studies it is argued that one reason for t he failure of these imaging studies to converge on similar cortical re gions is the lack of appropriate metrics that relate metabolic increas es to the variables manipulated in the experiments.