My 7 month old grandson has started turnoing his head from side to side, like he is saying no , not all the time, but sometimes when he does it he looks like it makes him a little dizzy, just for a moment, and his eyes roll soem, but then back to normal.What is this and is it serious? I am an RN, and do not want to unnecessarialy upset his parents. Mom was 40 and dad 46 when he was born, the first for both.