Figure 3.

Averaged fMRI activation in the prefrontal cortex over eight subjects for three coronal slice locations (20, 28, and 35 mm anterior to the anterior commissure). (Top) Areas that were more active for semantic processing (abstract/concrete judgment) than for phonological processing (syllable judgment). (Middle) Regions that were more active for phonological processing than for perceptual processing (letter case judgment). (Bottom) Areas that were activated for semantic processing of words compared with phonological processing of pronounceable nonwords. Left inferior frontal cortex (Brodmann areas 45 and 47) is located just above and below the left end of the horizontal line. Activation in left inferior cortex is prominent when semantic judgments are made (Top and Bottom) but not when phonological judgments are made (Middle).