This is interesting and alarming to me because judging by the changes in my life I appear to have entered the age-66 phase more than a decade and a half early despite remaining intellectually curious and physically fit enough.

In the last year or so I have begun to adjust my life expectations. My father was in his nineties when he died, but I no longer believe I will reach my seventies.

Things like this only tend to confirm my sense that I am neurologically ageing at a rate that is unusual.