Narcolepsy is a common cause of chronic sleepiness and is often accompanied by symptoms that include odd mixtures of sleep and wakefulness. A patient of ours is an intelligent and highly motivated young woman who developed unrelenting sleepiness during law school. No matter how much she slept at night, she struggled to stay awake while studying and her grades began to slip. One night when dozing off, she was certain that she heard someone breaking into her apartment, but after a few minutes, she realized it was a vivid, dream-like
