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Home Health & Medicine

Is sleepwalking genetic? Study suggests it runs in the family

Canadian researchers found that kids born out of parents with a history of sleepwalking are more likely to experience somnambulism. They found 60% of kids whose both parents reported sleepwalking also took slumbering walks in the middle of the night, or seven times more likely than kids whose parents had no history of sleepwalking. Children with only one sleepwalking parent were three time more likely to sleep walk.

Tibi Puiu by Tibi Puiu
May 5, 2015
in Health & Medicine, News

Canadian researchers found that kids born out of parents with a history of sleepwalking are more likely to experience somnambulism. They found 60% of kids whose both parents reported sleepwalking also took slumbering walks in the middle of the night, or seven times more likely than kids whose parents had no history of sleepwalking. Children with only one sleepwalking parent were three time more likely to sleep walk.

sleepwalking genetic

A team at Hopital du Sacre-Coeur de Montreal  analysed sleep data from a group of 1,940 children born in Quebec in 1997 and 1998 and studied in 1999 to 2011. Parents had to fill out a questionnaire in which they detailed their own sleep patterns, but also those of their children. The researchers focused on sleepwalking and sleep terror incidents. Sleep terrors are episodes of screaming, intense fear and flailing while still asleep. These are considered to be distinct from nightmares and linked to sleep walking.

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When people sleep walk, they’re carrying all sort of complex activities like opening fridges, dancing, whatever. Occasionally nonsensical talking may occur while sleepwalking. The person’s eyes are commonly open but have a characteristic glassy “look right through you” character. This usually occurs during a period of deep sleep, or a couple of hours after the sleepwalker falls asleep. The exact cause of sleepwalking is unknown, but these latest findings seem to suggest its genetic. Typically, it’s not that much to worry about though since it’s usually found among children, and most grow out of it once they hit puberty.

The following factors can trigger sleepwalking or make it worse:

  • sleep deprivation
  • fatigue (extreme tiredness)
  • stress and anxiety
  • fever
  • drinking too much alcohol
  • taking recreational drugs
  • certain types of medication, such as some hypnotics
  • being startled by a sudden noise or touch and waking from deep sleep, or waking from deep sleep to pass urine

Getting enough sleep and reducing stress are the best things you can do to reduce sleepwalking episodes.

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Results showed that children who had sleep terrors during early childhood were more likely to develop sleepwalking later in childhood at age 5 years or older than children who did not experience sleep terrors in early childhood (34.4 per cent vs 21.7 per cent). Overall, the prevalence of sleepwalking among the study group for children aged between 2.5 to 13 years old was 29.1%, while sleep terror prevalence for kids between age 1.5 to 13 was 56.2%.

“These findings point to a strong genetic influence on sleepwalking and, to a lesser degree, sleep terrors,” the study authors write. “This effect may occur through polymorphisms in the genes involved in slow-wave sleep generation or sleep depth. Parents who have been sleepwalkers in the past, particularly in cases where both parents have been sleepwalkers, can expect their children to sleepwalk and thus should prepare adequately.”

Findings were reported in JAMA Pediatrics.

Tags: deep sleepsleepsleepwalking
Tibi Puiu

Tibi Puiu

Tibi is a science journalist and co-founder of ZME Science. He writes mainly about emerging tech, physics, climate, and space. In his spare time, Tibi likes to make weird music on his computer and groom felines.

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