Something new happened yesterday with my son Mark who has a TBI - he was in the car with his friend Nicole. He has know her for about 5 months. They were driving home and all of the sudden he looked at her like he had never seen her before and said "I don't know your name". She said he looked at her like he wasn't "there". After that he had to be reminded of her name several more times.

He seems fine in every other way. Not sure what to make of this.