Some changes in the ability to think are considered a normal part of the aging process. We develop many thinking abilities that appear to peak around age 30 and, on average, very subtly decline with age. These age-related declines most commonly include overall slowness in thinking and difficulties sustaining attention, multitasking, holding information in mind and word-finding. Research indicates that age-related changes in brain structures such as decreased hippocampal, frontal and temporal ...