|Female patient, age 19. Presurgical demonstration of eloquent areas
ON: Silent word generation starting with a given letter
OFF: Think of nothing
|Activation of middle and inferior left frontal gyri, precentral left cortex, left angular gyri, and scattered areas in the parietal lobes.
|The main activated area in this phonetic fluency task is the superior aspect of the left inferior frontal gyrus. In contrast, the main area of activation on tasks requiring generation of verbs is the inferior aspect of Broca's area, along with the anterior insula.