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Cortex. 2013 Jun;49(6):1585-97. doi: 10.1016/j.cortex.2012.10.002. Epub 2012 Oct 27.

Differential effects of aging on the neural correlates of recollection and familiarity.

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Cyclotron Research Centre, University of Liège, Liège, Belgium.


The present experiment aimed to investigate age differences in the neural correlates of familiarity and recollection, while keeping performance similar across age groups by varying task difficulty. Twenty young and 20 older adults performed an episodic memory task in an event-related functional magnetic resonance imaging (fMRI) design. At encoding, participants were presented with pictures, either once or twice. Then, they performed a recognition task, with a Remember/Know paradigm. A similar performance was observed for the two groups in the Easy condition for recollection and in the Hard condition for familiarity. Imaging data revealed the classic recollection-related and familiarity-related networks, common to young and older groups. In addition, we observed that some activity related to recollection (left frontal, left temporal, left parietal cortices and left parahippocampus) and familiarity (bilateral anterior cingulate, right frontal gyrus and left superior temporal gyrus) was reduced in older compared to young adults. However, for recollection processes only, older adults additionally recruited the right precuneus, possibly to successfully compensate for their difficulties, as suggested by a positive correlation between recollection and precuneus activity.

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