AFNI: software for analysis and visualization of functional magnetic resonance neuroimages
Computers and Biomedical Research
Principal component neural networks: theory and applications
Principal component neural networks: theory and applications
Portraits or People? Distinct Representations of Face Identity in the Human Visual Cortex
Journal of Cognitive Neuroscience
Age-related Changes in Object Processing and Contextual Binding Revealed Using fMR Adaptation
Journal of Cognitive Neuroscience
Electrophysiological studies of face perception in humans
Journal of Cognitive Neuroscience
Task-dependent activation of face-sensitive cortex: An fmri adaptation study
Journal of Cognitive Neuroscience
Heterogeneous structure in face-selective human occipito-temporal cortex
Journal of Cognitive Neuroscience
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We investigated the neural correlates of facial processing changes in healthy aging using fMRI and an adaptation paradigm. In the scanner, participants were successively presented with faces that varied in identity, viewpoint, both, or neither and performed a head size detection task independent of identity or viewpoint. In right fusiform face area (FFA), older adults failed to show adaptation to the same face repeatedly presented in the same view, which elicited the most adaptation in young adults. We also performed a multivariate analysis to examine correlations between whole-brain activation patterns and behavioral performance in a face-matching task tested outside the scanner. Despite poor neural adaptation in right FFA, high-performing older adults engaged the same face-processing network as high-performing young adults across conditions, except the one presenting a same facial identity across different viewpoints. Low-performing older adults used this network to a lesser extent. Additionally, high-performing older adults uniquely recruited a set of areas related to better performance across all conditions, indicating age-specific involvement of this added network. This network did not include the core ventral face-processing areas but involved the left inferior occipital gyrus, frontal, and parietal regions. Although our adaptation results show that the neuronal representations of the core face-preferring areas become less selective with age, our multivariate analysis indicates that older adults utilize a distinct network of regions associated with better face matching performance, suggesting that engaging this network may compensate for deficiencies in ventral face processing regions.