Studies lend insights into syndrome.(The Dallas Morning News)

People who suffer from Restless Legs Syndrome have renewed hope that someone soon will unlock the secrets of their troubling sleep disorder.

So far, studies have found that the syndrome:

_May be linked to attention deficit hyperactivity disorder. A New Jersey study recently concluded that almost 40 percent of people diagnosed with the condition appear to meet the criteria for the behavior disorder, which is characterized by inattention, restlessness, distractibility and impulsiveness.

_Can be alleviated by several classes of drugs, including dopamine precursors that modify the signals sent between nerves and muscles. Others positive results have been found by those who use certain sedatives and anticonvulsant ...