everything I'm reading about attention is about perception and how we pay attention to visual details or selectively listen.

what I want to find out about is when we switch attention from perception to inner thoughts like memory, calculations etc. for example you will be trying to remember the name of someone you used to know, or you are working out something mathematical in your head and you kinda stare blankly and ignore immediate surroundings. that surely must be attention too.

but I can't figure out the name for that phenomenon. cognition and rumination don't seem to create the right search results.