Posting here for traffic. Does anyone know anything about involuntary movements by primary school children when stressed, not likely to be dystonia or tics, not linked to any LD/SN? When ds5 is on stage he often becomes very nervous and this shows with involuntary movements, jumping around and arm moving (and if very stressed, head moving too). It happens to a much lesser extent at other times. Doctors and teachers haven't seen anything like it. No one has mentioned a referral to anyone. DS is seen as quite bright and (when not stressed) very lively and "normal". I am not aware of any seizures. If he overheats in sleep he judders for a short time when he wakes. Thanks!