Somnambulism, also known as sleepwalking, is a sleep disorder in which you get up and start walking while remaining asleep. While sleepwalking, you typically do not realize what you are doing, and after the episode will not remember it. Sleepwalking occurs in the deep stages of sleep and is sometimes accompanied by meaningless talking. Genetics, environmental stimuli, sleep deprivation, irregular sleep schedules, stress, and alcohol intoxication can all contribute to sleepwalking. Certain medical conditions can also cause sleepwalking. These include: some mental disorders, fever, abnormal heart rhythms, nighttime asthma or seizures, or obstructive sleep apnea. Sleepwalking can occur at any age, but is most common in children age 4-8. Sleepwalking usually does not require any treatment, but any underlying medical conditions that may be causing sleepwalking, which your doctor can test you for, should be treated. If your sleepwalking causes excessive tiredness during the day, or puts you at any risk of injury (for example if you are doing dangerous things while sleepwalking) your doctor may prescribe medication such as benzodiazepines or antidepressants.