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
Dear media
why you doesn't mention hindu terrorists because he is not a Muslim name r8
BJP is lost in its arrogance
What you cultivate that you harvest. BJP may lose all assembly elections in future including LS. Let them be an arrogant tusker for few more days
Where is NIA?
Naren, when are u coming back to India, to place the meat bag in the Nagabana and to start a riot..... we are missing Mutalik, so you should fill his vacancy.....
Viren ...if it's a bajrangi victim....if minority then terrorist.....please clean your brain with water....not go moorhra....you may change your mindset
Haha there is no shortage for babu bajrangrees in India who are ultra nationalists ....today we might have tears ...but table will turn towards Islamic millitants for sure ...
This is what happens, they do but minorities are labelled as traitors
NAREN LOST HIS TWO BROTHERS....! STILL WE FEEL PITY...
Natasha....well said... God bless you .... May Almighty show us the way of humanity....... In your list of allegations, just add one more point.....Place the meat bag in Naga Bana and blame the Minorities.....this is what happened in Bhatkal recently....
VIREN..........Yes He is victim of Terrorism because he is scape goat in RSS terror Game ....same like Praveen /Prashanth poojary
@Viren, exactly you are right.. and also the cow killed Prashanth Poojary.. simply media blaming Banjrang Daakus and VH Saddists as murderers. Dont be blind in religion that you cannot make what is right from wrong
Wa Makaru wa Makara Allah wa’Allahu Khairul Makereen’ (Quran: Surah Aali Imran 3:54) 'They planned and Allah planned and Allah is the best of planners’.
our country is marching towards VINASH because of these Hindutva Aatankies (BJP, RSS, VHP, Shiv Sena, Ram Sena, Gay Rakshak etc.) They are treating all non Hindus as their slaves (Dalits, Chiristens & Muslims) & the governing BJP & MP Mr. Mozi are giving them full support. Gujarat under Mr.Mozi in past was same against Muslim.They are playing dirty politics.
Suno na Cheddi marmar...
ki yeh dhamake
Kuch bhi nahi hai...
aage tumhaare
Aaj se chappal pe mere...
raaj tumhaara....
Cheddi tumhara
What a great news. After Udupi incident, this news will surely cause at least a mild heart attack for the party of thugs.
Thank you God for averting a terror attack and punishing terrorist
Ethics of journalism is murdered here. Deekshit is a victim. not terrorist. Kannur is a place where PFI had organised terror camp years ago. Central government must intervene and expose the reality.
You traffic cows
You make bombs
You hoist Pak flag in India
You raise anti national slogans
You kill innocents
Then why the f*** you put the blame on Muslims???
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