Maybe that would explain her INABILITY to track objects part of the time. Her NON REACTION to some people (that plus she looks away from people she has learned not to trust)
Oh, I forgot, she is braindead and can't LOOK AT SOME PEOPLE and TURN AWAY FROM OTHERS : )
And allegedly, Terri responds to her mom most of all! How does a brain dead person know the difference between the mom and a hole in the wall?