초록

Previous studies indicate that physical fitness plays a protective role against age-related cognitive decline (e.g., Colcombe & Kramer, 2003). Using event-related potentials (ERPs), we investigated age-related cognitive decline in working memory processing and whether physical fitness positively influences working memory capacity in older adults. Data from 13 younger and 25 older adults (tested for their physical fitness) were analyzed. The participants performed a modified Sternberg memory search task while ERPs were recorded. The memory set was presented in upper-case letters, with a memory set size varying from 2 to 6. A lower-case probe letter following the memory set required a positive (“old”) or negative (“new”) response. Behavioral data showed age-related but not fitness-related differences. The ERPs, elicited by the memory set, showed (a) an age effect in the posterior P1 component, and (b) age and fitness effects in the frontal negativity. These results suggest that age affects general working memory processes, but physical fitness may help specifically to reduce the decline of working memory capacity.

키워드

aging, physical fitness, working memory capacity, event-related potentials(ERPs), frontal negativity

참고문헌(63)open

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