The present study investigated whether neural structures become less functionally differentiated
and specialized with age. We studied ventral visual cortex, an area of the brain that …

Functional magnetic resonance imaging (fMRI) was used to investigate whether semantic
judgments about products and persons are processed similarly. Our results suggest they are …

… Polk and Farah Citation81 demonstrated neural segregation of letters and digits in young
adults using fMRI, by showing selective activation for these two stimulus types. Moreover, in a …

… In previous computational work, we proposed a cooccurrence hypothesis to explain how a
letter area might be created (Polk & Farah, 1995a). The account is based on three simple and …

Most theories of deduction have assumed that linguistic processes transduce from language
into an internal representation and back again, and that non-linguistic processes are central …

Tailored health interventions can be more effective in eliciting positive behavior change than
generic interventions, but the underlying neural mechanisms are not yet understood. Here, …

Current theories of cognitive aging argue that neural representations become less distinctive
in old age, a phenomenon known as dedifferentiation. The present study used multi-voxel …

Previous studies have found that cortical responses to different stimuli become less distinctive
as people get older. This age-related dedifferentiation may reflect the broadening of the …

Although much of the brain’s functional organization is genetically predetermined, it appears
that some noninnate functions can come to depend on dedicated and segregated neural …

… Polk; and by grants from the NIH, the Office of Naval Research, the Alzheimer’s Disease
Association, and the Research Association of the University of Pennsylvania to Martha J. Farah. …