Neural correlates of cued recall in young and older adults: an event-related potential study
Résumé
This experiment investigated age differences in electrophysiological correlates of retrieval success in a word-stem cued recall task. Young adults (M±SD: 21.4 years±1.9) performed this memory task more accurately than older participants (M±SD: 65.1 years±3.3). Robust event-related brain potential (ERP) old/new effects were identified in both age groups. The main age differences were observed in latency and lateralization of ERP effects. Young adults exhibited a parietal effect that became focused over left parietal electrodes, whereas no asymmetry was observed in older adults. Moreover, ERP effects were more delayed in the older group. Overall, these findings provide some evidence of the reduction of processing speed during aging and suggest that young and older adults may recruit distinct cerebral patterns during episodic cued recall.