High Quality Content by WIKIPEDIA articles! Kleine-Levin Syndrome or KLS (also known as Sleeping Beauty Syndrome) is a neurological disorder characterized by recurring periods of excessive amounts of sleeping and eating. At the onset of an episode the patient becomes drowsy and sleeps for most of the day and night (hypersomnolence), waking only to eat or go to the bathroom. When awake, the patient’s whole demeanor is changed, often appearing “spacey” or childlike. They also experience confusion, disorientation, complete lack of energy (lethargy), and lack of emotions (apathy). Individuals are not able to attend school or work or care for themselves. Most are bedridden, tired, and uncommunicative even when awake.