Brain activity and sleep are the connection you are looking to solve. You son has too much brain activity. To minimize it, read food labels to find the following brain activity stimulating foods to eliminate from his diet:
corn syrup and corn syrup solids, food dyes (FD&C red, green, yellow, blue...), caffeine and chocolate, corn meal, enriched white flour and refined sugar.
Start your son on a diet that is high in whole foods, fruits, vegetables and meats. Then make sure to give him a very high protein, no sugar snack before bed: cheese and whole grain bread, cheese and whole grain crackers, un-sweetened peanut butter and bread, beans and rice...
In our culture, children like this are labeled ADHD when in fact they are just fed too many brain stimulants. Eliminating these NOW will help him to calm down and become restful again.
You will also need to eliminate television at night - it is too stimulating for sensitive children. Long stories from chapter books before bed, read slowly and quietly, will prepare his brain for sleep instead of restless dreams.
Go to www.thomhartmann.com and look for his books on ADHD for more help with your active and sensitive son.