It's easy to imagine a depressed person as someone who stays in bed all day, hiding under the covers away from the rest of the world. In reality, however, most depressives don't sleep that much. It's believed that nearly 80 percent of people with the condition experience disordered sleep behaviors, such as lying awake at night, waking several times throughout the night or rising too early in the morning [source: Jaret]. The reason behind these behaviors is the same one that can cause a person to eat less: neurovegetative symptoms [source: Dantzer, et al].
Ironically, lack of sleep may lead to depression [source: Kaneita, et al]. Therefore, a depressed person who sleeps less can find himself or herself in a cycle of insomnia and depression that continually feeds itself. If a depressive is experiencing a change in sleep behaviors, it's ideal that he or she seeks treatment for the behavioral health condition as well as the sleep disorder. Of course, not everyone with depression sleeps less. Atypical depression can lead to sleeping more, just as it can lead to eating more.