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
Its everywhere in mangalore... Check the police records.... Ok.. So what sdpi needs to do... Dont blame a particular area.... Most of. Sdpis are from there.....
This Goons already ashamed by safwan parents and locals so, now they compensation asking for both Raju kotian and safwan haha ha what a joke!!! jokers around SDPI..............
Being from Ullal it is true that Ullal is becoming adda of drug addicts.People terrified to go out. With addiction of ganja everyone want to becoming don and threatening common people.
\You wonderful fools did not understand, not woke up, brought up in this nation , Education half of the way, mostly job less, awaiting Middle east go!!! no Idea about work, am not mentioning you Buffoons, YOU ALL WELL CLEVER SOME TIMES IN THE WELL!!!!. \"Divide and rule applicable here in Hindustan\" you all wonders divide in all parties, this is your fate masters, blame Each other only the solution and afterword's some one killing you one or other day.
Be try to be safe under one umbrella not to divide and blame each other, OTHERWISE THIS IS THE SITUATION TO YOU ALL.
Just go to your mind to our favourite or Hesitate State \"KASHMIR\" now Criminal Goonda Looters ruling, believe it, same fate to you in Ullal!!!
Jai Hindustan."
It is not a time for blame game...SDPI is opportunistic party...trying to find political foothold around...their intention is very bad....
All Dont make fabricated comment and Dont support all these criminals.
All should be United-Hindu Muslim & Christian and fight against RSS & Grubby Politics
Good Move by SDPI.
Ullal is a beautiful place, and parties like SDPI is a master mind behind all the communal activities.
SDPI is intentionally defaming ullal's name, the only reason is they couldnt win the last election.
I Agree, all cattle thieves, drugs dealers, criminals, love the place called Ullal
Dear SDPI Brother's
Dont wait for the Govt to Curb your own brother's from doing Wrong.Its each one of ours responsibility to teach them about Islaam is,About life after Death,Rather pin pointing other's First do your self then blame the Govt.
I know its very hard to accept for each one of Us.So we start blaming other's.Directly or Indirectly we are also responsible for all this and we will have to answer the ALMIGHTY ALLAH.
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