Yes, and you are not alone

My son did this to me also, until I couldn't take it anymore and made an appointment with his neurologist. Not only is your mother losing valuable rest, your brother is, too. This pattern of sleepless nights will no doubt affect your brother's ability to function well the next day, particularly if he is in a school setting.
This is what we did and it worked like a miracle: My neurologist prescribed Risperdal, which has taken an impossibly hyperactive, non-functioning human being and turned him into an autistic boy who often acts like he doesn't have autism at all.
My son is very playful and mischevious, and likes to escape. We put a doorknob on his door but reversed it so that the lock is on the outside. We lock it at night after he has had his dinner, bath, tv time, playtime, etc...when it is his bed-time, we tuck him in his bed and kiss him and then lock him in the room so that he cannot escape. Every morning I unlock the door, and whenever he wakes up he comes out. We also have unscrewed the lightbulb in his room because he would leave it on all night and couldn't sleep because of that, either. Now, because he knows he cannot leave the comfort of his bedroom or turn on the light, he is finally able to relax his mind and, in part because of the risperdal, he sleeps soundly for 12 hours a night. We put him to bed at 7:00 and he wakes at about 7:00. He gets good rest and I am able to have some down-time to refresh myself. I hope that helps you!

-Katie