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
Feeling deeply hurt while reading such news about this Genius, Brilliant and highly knowledgeable person. What was his mistake ?that he called people toward truth? made them spend proper life and to lead a peaceful life which may benefit mankind in both the world?? he spoke the truth publicly is the terrorism??is he provoked anything which made his team to kill anyone. Many people in the world appreciating about his deeds but same time many people talking bad about PM Modi so who is what here. His Allah is with him and he is a strong believer. May Allah protect him from this calamity Aameen.
Islam says Suicide is an unforgivable SIN...
ALLAH gave us this LIFE, and QURAN is the manual to understand what is LIFE...
Non-Muslims should read the QURAN (U can check online thequranproject) to understand better, How ALLAH created Life and death and What is the purpose of this life...
QURAN is not just for the Muslims... it is a GUIDANCE from our CREATOR To the whole of UNiverse... Please look into it... U will be enlightened.
Those who are HONEST in looking for the CREATOR... ALLAH will Guide them... thats the trust we should have.... God is GREAT (ALLAHU AKBAR)
NA TASYA PrATIMA ASTI... there is no image of God....
she needs beef sukka
IS this not enough for HINDU brothers & Sisters to stay far away from the real Killers of our society. if U dont use your intellect and recognize the real culprits in our society... We will all dome our society with the liars and killers in disguise.
Whatever ways U want to block , ISLAM will grow with Zakir naik or Without HIM...
Enemies of ISLAM plan, But ALLAH has a plan...
Everything happens with the will of ALLAH. ALLAH's plan will Succeed..
Non Muslim should use their God given intellect to VERIFY what wrong thing Dr. Zakir naik says... If he is bringing near to the one LORD ALLAH to U guys then accept it (Even vedas says NA tasya pratima Asti - There is no image of GOD) Dont U think as Human beings are the smartest creation of ALLAH who can analyse and reason when they use their INTELLECT.
Why dont U guys think and PONDER on the lives we were created by ALLAH... Y We only believe the LIARS when we know the authorities caught lying many times...
Wake up guys... and PONDER on what ZAKIR NAIK says and Stop believing whatever LIARS want U to believe.
Add new comment