Skating instructor held for 6-yr-old's rape in Bangalore

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.

Tumakuru, Jun 30: As many as 43 sheep were quarantined after a shepherd tested positive for novel coronavirus at Godekere Gollarahatti in Tumakuru district. 

J C Madhuswamy, district in-charge minister, has instructed the district administration and the Animal Husbandry department to subject the sheep to Covid-19 tests.

The move followed after five sheep found dead in mysterious circumstances at the village. All 43 sheep of the infected person have been isolated from the herd and kept at a place in Jakkanahalli.

"There is no evidence that the sheep can contract Covid-19 and transmit the virus to the people. But since the virus has many strains and keep changing its genetic make-up, draw throat swab samples of the sheep and send the same to Covid-19 lab. Till the report comes, keep the livestock in isolation," Madhuswamy told the officials.

Mangaluru, Jun 1: A youth was hacked to death and two others suffered critical injuries following a fight between two gangs at Yekkaru Devaragudde near Kateel under the limits of Bajpe police station last night.

The deceased has been identified as Keertan (20), a resident of Marakada. The injured are Nitin (20) and Manesh (20). It is learnt that old animosity led to the attack and murder.

According to sources, members of both gangs were friends in the past. They had become enemies of each other following a fight regarding sand mining.

Sources said that Keertan, Nitin, and Manesh had reportedly invited their rival gang to Devaragudde for some discussion. A verbal friction arose between the two gangs and it culminated in the attack by the rival gang members with daggers. Keertan reportedly died on the sport. The other two were taken to hospital.

The accused fled the scene soon after committing the crime. A case has been registered at Bajpe police station. A manhunt has been launched to nab the accused.