You hear about these a lot in people with Alzheimers. This can also happen to normal people when they eat right and get a good night's sleep and feel very clear headed.
I am looking for a more formal word, as opposed to informal (e.g. A-game days would be informal)
Is there a term, preferably one word, that describes this phenomenon?
They have lucid days.
Showing or having the ability to think clearly, especially in intervals between periods of confusion or insanity:
but it's not usually applied to people whose mental processes are normal all the time.
Example:
"We have heard from several people that close relatives with Alzheimer's disease became amazingly lucid for short periods of time after receiving narcotic pain relievers."
More examples:
