Overall, the children became less hyperactive and gained a greater attention span. Experts say getting a better night's rest made the difference.
Enlarged tonsils that caused sleep disturbances were thought to be at the root of some behavioral problems.
This study in the Archives of Otolaryngology also found children who had their tonsils and adenoids removed for sleep-related breathing disorders still slept better 2 1/2 years later than they did before the procedure.
