Sleepwalking, also known as somnambulism, is a type of parasomnia disorder characterized by walking or performing other activities while asleep. Other synonyms for sleepwalking include noctambulism, night walking, and somnambulation. Some people may also refer to it as "ghost walking" or "zombie walking" due to the eerie appearance of sleepwalkers moving around while appearing to be in a trance-like state. Sleepwalking can be caused by various factors such as stress, sleep deprivation, and medication side effects. While it is typically harmless, it can result in injuries or potentially dangerous situations. Treatment for sleepwalking usually involves addressing the underlying cause and making environmental modifications to ensure safety.