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
Is Modi Govt taking care of indians or UK. Is he PM for UK or India. He has already sold India in the hands of foreign investers and now selling indian assets also which was inherited from old kings. May be Modi will sell Taj Mahal, Qutub Minar, Vidhana soudha, Srirangapatna Mandir, Kollur Mandir to foreigners and make money for bjp and its supporters. shame on you bjp Govt. It will be better to kick out this Govt very soon otherwise we Indians will be completely sold out to foreigners. Beware of this looter's Govt.
Cheddi fans are BLINDLY supporting him. Start opening your EYES ... Looters have no issue and those helper who in the first place helped the british to loot the KOHInoor has no issue... Its not new.
Modi Govt. is a very big fake and rubbish Govt. any promise they fulfilled till now..?, hope their term will complete very soon after that only Acche Din will come..
After all RSS is the agent of British raj. How can they go against their
will ? THE REAL NAME OF RSS IS ROYAL SECRET SERVICE, which was giving then British rulers information about indian freedom fighters.
They are their sole agent then and even now.!
BLACK MONEY BHI NAHI KHOHINOOR BHI NAHI
Waah thief waah!!!
Next he will tell British never invaded India.
We invited them to learn to wear bikini.
RSS is the enemy of India.
It did not surprise me... We know cheddis partner during freedom struggle...
I think Kohinoor diamond belongs to Mugals (Shahajan). how Ranjith Sing is gifting British
Yes, its nice to see it with queen rather than kept here in India...someone will take it if it is kept here....can't trust....
Same like \National Herald is gifted to Sonia Gandhi and not looted by her\" as claimed by Congress party."
If a slave gives a \gift\" to his master, there is always room for reinterpreting the idea behind the \"gift\". But if the new masters are not different from the old, how can this happen? This is the tragedy of India - and this is why we ought to see that the Cong, BJP, CPI etc are actually a continuation of the British colonial legacy. You can defeat them in some cricket matches, but when it comes to substantive issues, you concede the match even before it begins. This is the colonialism of the mind."
Look like air leaking from 56inch chest.
Soon it will be 26 inch.
This decision of govt also justify
British rule over India.
Shame on BJP.
bjp and rss revere godse, the criminal who brutally killed Gandhiji. bjp/rss are agents of british
We want Kohinoor back, who is government to tell them to keep it and they then call themselves as nationaliats. These are real anti-nationals and agents of British.
@Tolerant Indian: Disappointing. The Brits don't deserve our Kohinoor. But if was a gift, then we shouldn't be expecting it back. Blame our Maharaja of Punjab. Height of MASKA GIRI.
Tolerant Indian: spineless modi. Kohinoor belongs to India. it is India's shaan. lalit modi now vijay mallaya took our money to UK. farmers and poor are committing suicide and government gifting riches to other countries.
@Tolerant Indian: Indians have the generosity to make the world rich, by gifting and stashing money in foreign countries!
We have had gifted everything to British during British rule! And now our Rich Indians started gifting by moving out of the country to get settled in UK? There is no surprise, everything is fine in Love to English!
Bring Kohinoor Back Kohinoor was our heritage, it should be brought back.
Kohinoor wasn't a gift. But a war prize that was pushed down our throats by sly East India Co. Better revise stand.
Everyone knows that RSS is always acted as British agent.
Kohinoor was not stolen from India. It was merely abducted. Shine On You Crazy Diamond.
Someone just told me 'we have enough gems in the govt, who needs Kohinoor.'
Okay Britain, let's do a deal. You give us back on thing we gave you - Kohinoor. We'll give you back one thing you gave us - Section 377.
modi govt run by buffoons: Kohinoor gifted by Ranjit Singh to brits? he died in 1839, brits snatched diamond in 1849!
After all, the difference between \gifted\" and \"lifted\" is just one letter."
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