My grandson, 8 years old, has had a sudden change in behavior over the past year. He's become angry, saying we're making fun of him, got in trouble in school last year (doing better this year, but still a very unhappy child), wants only to read or play video games, does not want to interact or be touched. He's disrespectful when talking to an adult, taking any question they might ask as an affront of some kind. He used to be a happy child, loving to tell you what he has just learned or read. He didn't like his teacher last year, which might have had some bearing on his changed behavior, but it seems he should be over it. I'm wondering about some kind of neurological disorder.