Does my son need medical treatment?

I have 2 children. Both of them have a history of febrile convulsions at the age of 2. My son is now 11 years old. Ever since the attack, all these years, he jerks and twiches his legs and hands during his sleep. Is this associated with convulsions and does it require any treatment? An EEG was taken at the age of 8, but nothing was found. We are not sure what to do. The movements start during the initial period of sleep and last the whole night. Once he woke up suddenly and said he felt as if he fell from the cycle. Other wise he is an active child. Please guide us.