Abstract: A study on the frontal EEG characters in aging and its correlativity with some cognitive abilities was accomplished on 120 subjects of 46 to 80 years of age. The cognitive ability test consisted of 12 tasks and included 4 items of speed and 10 items of performance,total 14 indexes. The results indicated:1) The alpha peak frequencies slowed down and the alpha powers showed with age a tendency of increase in the left and right frontal areas: 2) The speeds of three tasks correlated significantly with the alpha peak frequencies in both the frontal areas, but only the performance of "free recall of picture"correlated with the alpha peak frequency in both the frontal areas and the alpha power in the right area in aging.

Key words: electroencephalogram, cognitive ability, aging