Washington D.C., May 8: The prime time for brain development in a child's life is the first year, where the infant spends most of the time asleep. It is the time when neural connections form and sensory memories are encoded.
However, when sleep is disrupted, as occurs more often among children with autism, brain development may be affected, too.
New research led by the University of Washington finds that sleep problems in a baby's first 12 months may not only precede an autism diagnosis but also may be associated with altered growth trajectory in a key part of the brain, the hippocampus.
The study, which was published in the American Journal of Psychiatry, researchers report that in a sample of more than 400 taken of 6- to 12-month-old infants, those who were later diagnosed with autism were more likely to have had difficulty falling asleep.
It also states that this sleep difficulty was associated with altered growth trajectories in the hippocampus.
"The hippocampus is critical for learning and memory, and changes in the size of the hippocampus have been associated with poor sleep in adults and older children.
As many as 80 per cent of the children with autism spectrum disorder have sleep problems," said Annette Estes, director of the UW Autism Center and senior author of the study.
"In our clinical experience, parents have a lot of concerns about their children's sleep, and in our work on early autism intervention, we observed that sleep problems were holding children and families back," added Estes, who is also a UW professor of speech and hearing sciences.
"It could be that altered sleep is part-and-parcel of autism for some children. One clue is that behavioural interventions to improve sleep don't work for all children with autism, even when their parents are doing everything just right. This suggests that there may be a biological component to sleep problems for some children with autism," said Estes.
To consider links among sleep, brain development, and autism, researchers at the IBIS Network looked at MRI scans of 432 infants, surveyed parents about sleep patterns, and measured cognitive functioning using a standardized assessment.
At the outset of the study, infants were classified according to their risk for developing autism: Those who were at higher risk of developing autism -- about two-thirds of the study sample -- had an older sibling who had already been diagnosed.
Infant siblings of children with autism have a 20 per cent chance of developing autism spectrum disorder -- a much higher risk than children in the general population.
In the current study, 127 of the 432 infants were identified as "low risk" at the time the MRI scans were taken because they had no family history of autism.
They later evaluated all the participants at 24 months of age to determine whether they had developed autism. Of the roughly 300 children originally considered "high familial risk," 71 were diagnosed with autism spectrum disorder at that age.
Problems with sleep were more common among the infants later diagnosed with an autism spectrum disorder, as were larger hippocampi. No other subcortical brain structures were affected, including the amygdala, which is responsible for certain emotions and aspects of memory, or the thalamus, a signal transmitter from the spinal cord to the cerebral cortex.
The authors note that while parents reported more sleep difficulties among infants who developed autism compared to those who did not, the differences were very subtle and only observed when looking at group averages across hundreds of infants.
Sleep patterns in the first years of life change rapidly as infants transition from sleeping around the clock to a more adult-like sleep/wake cycle. Until further research is completed, Estes said, it is not possible to interpret challenges with sleep as an early sign of increased risk for autism.
Comments
Yedi & Shoba Always to be in Media with no Reason. Why is Media promoting when BJP says Madrasa is giving rise to Terrorist. Media is blowing things out of propotion. What happend with Hemanth Karkere(HK)? Who Killed him? He was telling the news of actual terrorist in India. Hope everyone remembers what HK revealed. I dont support any of the party. But BJP did biggest blunder by doing demonitization. Just to make their money white. People please grow up. See the Petrol price HIKE happening. Why SHELL petrol does not have Subisidy? Why GST is not introduced in Petrol ? There are so many things to think about. These people play with law & order. See yeddy is so confident giving Dhamki to Police. Only god can Save us !!!
The common man of India is struggling for fulfilling his basic needs, he wants peace, he does not need leaders who divide society on caste and religious grounds and create chaos and hatred in the country.
Well said, Most of the BJP leaders are responsible to created violation.
Statistics show that more Indians have been killed by RSS than by Pakistani terrorists.
Who then is worse?
Is she a member of parliment or she a member of RSS, I havent seen any statement from shobha who has talked of development from her mouth. every time her statement is about RSS/sangh parivar, Does she deserve a MP seat? its better she owes her full time to RSS intead of being a MP. Shame on her she represents the whole constituency not only RSS AND SANGH PARIVAR TERRORISTS
what STRATERGY to DISTURB PEACE OF OUR NAMMA NADU KARNATAKA
Fact is a fact, why Amit shah is not in the group,who is the main culprit holding 14 muderes on his head
"BJP gay nachgayne Illa",
if they have little shame left all these leadres would have not come to street with head's down for their super leaders who committed the crimes,
Indirectly it shows that they confirms what Mr Siddaramaih says..!!!
"nanu BJP nanu RSS", not full
"nanu BJP nanu RSS nanu BrahminBaniaJumlaParty", better!!!
Hindus beware of Brahmin Domination in RSS, they dominated exploited non-brahmins for past 5000 years, dont let them control us!!!
All are equal in Democracy, RSS is a Rascist organisation, majority leaders are Brahmins! Dont forget!!!
Congis are ######s, they were responsible for 1984.
Bjp are ######s, they were responsible for 1992, 2002.
Indira made a political decision, bad decision BUt a political one.
Advani, Joshi, Uma bharati gave speeches in Ayodhya which started riots killing of 3000 people.
Both parties have blood on their hands.
Both need to be sacked and someone better needs to be brought in.
@Truth
Excellent question. The current vicious atmosphere is because of them
Who perpetrated 1984 anti-sikh riots? RSS?
Good decision. Please go and sit in jail.
Nanu shoba matthu yediyurappa naau bjp rss bajarang te ... r.. r ... t ect.....
Another comedy by Sho-bokka. Please try a good mimicry
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