Symptoms;, unable to create clock face drawing. Could not do numbers - wrote 30 for 6 and 45 for nine. Describes black out STM as though power in brain turns ut self off for 5 to 19 seconds. Unable to use Microsoft menu despite computer guru for 30 years: could not identify which programme to open or which programme to use. Could not work out how many minutes before bus came from electronic arrival board a couple of times. Complete fog & inability. Scans & bloids no problems. Bit feeble & falling backwards but like other symptoms. 63 highly educated - any ideas? Drs confused.
My Dad use to write Code for computer programs, and as he aged he would start forgetting passwords and where he had kept the passwords for safe keeping. Eventually he stopped using his computer.
When it comes to bus electronic arrival boards, sometimes it is easier for an elder to use a regular clock which has hands. Usually that is ingrained into their minds since childhood. I know for myself, I refer a hand clock compared to a digital readout.
Any vascular or heart disease?
If doctors who have examined him are confused, I don't think we are going to be able to come up with valid explanations.
What kind of doctors have seen Dad? (Internist, GP, Psychiatrist, what?) Have they suggested further tests? If you are looking for second opinions, I suggest a behavioral neurologist or a geriatric psychiatrist.
Good luck to your whole family!