Wow I know exactly what you are describing. I try so hard to stay in the game but say we are having a meeting and all of the sudden i am gone eyes are not focused on anything not hearing anything, well hearing but not absorbing any information. I try to pull it back in even try to repeat what the person is saying in my head but the only word I have is the last one spoken. I do not know what this is at all but I wish I did so it could be fixed.