One of the goals of recent research has been to find ways to prevent major strokes after individuals have sustained a minor stroke or TIA. Up until now, stroke doctors have focused on treating elevated blood pressures and cholesterol levels, scanning the blood vessels in the neck for significant narrowings, and searching for irregular heart rhythms, all of which are treatable conditions that put patients at risk for having a stroke. Despite research which shows that sleep disorders such as sleep apnea (abnormal pauses in breathing during sleep) or restless legs syndrome (which can cause involuntary leg movements in sleep) are possible risk factors for stroke, these conditions are not routinely investigated by stroke doctors after a TIA or stroke.