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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ramadam went came again again went .He is not seen like you .Pls do not bring religion in all things
hello bhai super pls send u r no. all the best
Rana krishna 10 Cross heghe nagar
hi zaid bro welcome to bollywood industry
May almighty Allah guide all Muslim ummah to the straight path. Ameen.
Holy month of Ramadan, film releasing, so sad!
Br. Zaid, may Allah guide you to be a good and religious muslim. Whatever your physical apperance is, from Allah, it's not of your's. It is like a floating buble on the surface of stream of water. It won't appear for a long, so like we, the human beings. After that, you think of your physical appreance. In this holy month of Ramadan each & every Muslim maximum trying to obey Allah & get pleased by Him. Don't think that the life what we are enjoying is the real life, but our real life really means from the moment of our death. So, fear Allah and refrain from your present decission and put all your efforts to be a good practical muslim and there by teach your dad & whole family about \deen e islam. May Allah bless you forever to make use of your tallents to study, practise & preach the correct deen in its origial shape. By your Brother in Islam. Yaa ayyu alladeena aamanu koo amfusikum va ahleekum naara, this ayath of quran reminds every muslim to safe guard them selves and fellow muslims from the hell fire."
Not necessary all Khans should be a super hit. Look at those Khans like ZAHID Khan, Imran Khan, Ayyub Khan, Kamal Khan and so on and so forth. They are not been seen now.
Good news in Ramadan. The Khan rule is all set to begin in Kannada film industry (sandalwood) like Bollywood. Congratulations to Zaid Khan the future super star of south India. Good that you r starting your film career in Ramadan. that too in last 10 days of Ramadan. wah kya kamal ki batth. masha allah. swarga guarantee...
all khans are ganapathi khans.. severel years back mr zameer ahmed had given ganapati idol to mr kumarswamy as his birth day gift.. that mean this khan also is a devoti of ganapati like bolly wood khan sharuk and salman keep it up
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