Why Periodic Limb Movements Are Not Restless Legs Syndrome

This is an issue that confuses patients and sleep specialists alike: what is the difference between periodic limb movements of sleep and restless legs syndrome? And why does it matter? Movements of the legs at night can disturb sleep and lead to insomnia. However, not all movements are alike. In order to understand the difference between overlapping disorders, it is important to get back to the basics. Restless legs syndrome (RLS) is a condition that leads to discomfort in the legs and may even be associated with intentional, conscious movements. It consists of four key features: An urge to move the legs, usually accompanied or caused by uncomfortable and unpleasant sensations in the legs. The urge to move or unpleasant sensations begin or worsen during periods of rest or inactivity such as lying or sitting. Sensations that are relieved by movement, such as walking or stretching, as long as the activity continues. Sensations that are worse during the evening or night. RLS is a clinical diagnosis. It is based on the symptoms that a patient complains of and no testing is required. The prevalence of RLS is estimated to be 5% to 10% of people. It is often treated with iron replacement and prescription medications. Interestingly, RLS is commonly associated with unconscious periodic limb movements of sleep (PLMS). This is a separate diagnosis, and one that is made based on the results of a polysomnogram. When a sleep study occurs, wires are placed on the front of the leg...
Source: About Sleep Disorders - Category: Sleep Medicine Source Type: news