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2. Sleepwalking is Genetic

Those with siblings or parents who have experienced sleepwalking or night terrors are more likely to experience it themselves. In one study published in The British Journal of Psychiatry, 80% of the sleepwalkers had a family member who was also affected by sleepwalking, and 96% of the night-terror subjects had a family member who was affected as well. Sleepwalking is more prevalent and less severe than night terrors, although the conditions share a common genetic predisposition. A twin is five times more likely to experience sleepwalking episodes if the other twin sleepwalks. Even though sleepwalking is hereditary, it is influenced by environmental factors which is why some children regularly sleepwalk, while a sibling may not.

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