I have gone past 81 now! Though I have well established, "idiopathic Parkinson's disease", my mind (whatever fraction left) does not accept of the fact, I am a geriatric with PD added as bonus, for a fast track departure of which I am not really worried but fascination of the end makes ever curious about departure despite the fact of 4 decades' clinical scenes of the same. Most of my Colleagues of 60's - 80's era have passed away and even NHS Hospitals, where I had toiled and loved, up from Scotland, down in England- pulled down, to make way for new.
Though I have residual memory to ponder the past, I have become "little old man" with reduced body, gait and posture. No regrets when I become Stardust!