Hey, maybe all these PubMed deep dives will help...along with everything else I do in a day's time.
Mental activities may protect against mild cognitive impairment
The benefits of being cognitively engaged even were seen among apolipoprotein E (APOE) ε4 carriers. APOE ε4 is a genetic risk factor for mild cognitive impairment and Alzheimer's dementia. However, for APOE ε4 carriers, only computer use and social activities were associated with a decreased risk of mild cognitive impairment.