A friend of mine goes to a VA clinic. They tell him they haven't found a diagnosis for him. He calls it a"brain freeze".Symptoms: Total lack of concentration with no way to respond to questions or statements. He can not finish something he states. He can move around, smoke, but has a zombie look to his demeaner. If he is at a check out counter with me, I would ask him to take out his wallet and go through the steps of purchasing. He wouldn't be able to take out the wallet.These attacks or spells come about every 4 -7 days. Anyone know of someone with similar behavior and a diagnosis? Anything to help him.