Hi! my ds has recently been dx with AS and possible DAMP. not much experience yet myself, as it's all still quite "new" for us too, and at the moment help is focussing on generally getting him settled at nursery. hopefully someone ese will come along, as I'd be very interested to find out more myself.
This was suggested to me when ds1 was younger, but then they dismissed this as he can ride a big and stand on one leg, basiccally from what i gathered its attension span difficulties, fine and gross motor control skills, perception so they tend to be looking behind you and bump in to things etc, and they can help with things like physiotherapy, OT, etc. the link above may shed some more light on it (I didnt look at it before, sorry)