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.
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After all these sufferings,it pains a section of us,common peole still support demonetisation !
What was supposed to be a surgical strike against tax cheats and counterfeit currency became an attack on a large informal economy that ran almost entirely on cash. The hardships caused by a shortage of new legal tender, and the rush to deposit old 500 and 1,000 rupee ($15.40) notes in bank accounts before the Dec. 31 deadline, took a heavy toll. More than 100 people died in bank and ATM queues, although it's impossible to confirm if the deaths from heart failure or exhaustion were directly a result of demonetization.
I Will donate one rope to hang him.
@Truth Teller - I share your views 100%
Honestly, i am not sure what is there to like about Congress! Besides all the scams running to several thousand crores and losing face in the international scene (thanks to Kalmadi) they have played religion & caste politics for decades for vote bank ruining the country. For the first time after independence perhaps there is some move towards honesty, improving infrastructure, education and cleanliness. Why some continue to hate Modi is just beyond me if you truly love this country. Rahul is bad news for India unless they find someone else who can be like Modi - hardworking & with a vision to change.
Honesty is incompatible with the amassing of a large fortune - Mahatma Gandhi
Modiji is the true and honest man after Gandhi
Demonetization in India was a war against dishonesty and it is a movement against corruption.This exercise has brought an awareness to the people not to make wealth dishonestly.Majority of the people wanted honest system in India and supported the Government's initiative on demonetization.
I am a hardworking sincere person. I earn for a living and to support my family, because of demonetization me and my family suffered without any cause. This man freezes our transactions to a minimum of 2000 and what not. Who was he to do it, By law it is not permissible unless a person is held guilty by law agencies.
Because of one man 100 innocent died standing in queue. How come once company made 160000 times profit during demonetization, Where is the black money, what happened to panama papers. These statistics have to shown after demonetization. Even now they are misleading crores of people with data not important to Aam Admi.
Dinesh Gundu will soon be under police custody
Nobel prize winner praised Modi for demonetisation and digital India and later he confessed he told wrong after knowing that Modi banned old 100&500 notes and implemented 2000 rupees notes..
I can say Modi is the best intelligent person in the world. And he should get business man of the year award.
Because,
1. Modi made huge benefit to Paytm (paytm ceo didnt do this much profit for his company)
2. Modi made profit to the private agency which made/maintaning aadhar things.
3. Modi made profit to Jio
4. Modi made profit to big companies by implementing demonetisation and GST (same time it affected badly on small scale retailer shop)
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