Ullal: Vigilantes attack college student for roaming with girl; two arrested

Bengaluru, Jul 21: The total number of Covid-19 cases in Karnataka breached the 70,000 mark on Tuesday as the state reported 3,649 fresh infections, while 61 fatalities took the death toll to 1,464, the health department said.

The day also saw 1,664 patients getting discharged after recovery. Out of 3,649 fresh cases reported on Tuesday, a whopping 1,714 were from Bengaluru urban alone. As of July 21 evening, cumulatively 71,069 Covid-19 cases have been confirmed in Karnataka, which includes 1,464 deaths and 25,459 discharges, the health department said in its bulletin.

It said that out of the 44,140 active cases, 43,557 patients are in isolation at designated hospitals and are stable, while 583 are in Intensive Care Units.

Twenty-two out of 61 deaths reported on Tuesday are from Bengaluru urban, followed by five each from Dakshina Kannada, Mysuru and Dharwad, four each from Kolar and Belagavi, three each from Hassan, Tumakuru and Haveri, Bidar 2, and one each from Chikkaballapura, Chikkamagaluru, Chamarajanagara, Gadag and Vijayapura.

Most of the deceased either had a history of Severe Acute Respiratory Infection (SARI) or Influenza-like illness (ILI). Out of 3,649 cases tested positive on Tuesday, contacts of the large number of the cases are still under tracing.

Among the districts where new cases were reported, Bengaluru urban accounted for 1,714, Ballari 193, Dakshina Kannada 149, Mysuru 135, Yadgir 117, Uttara Kannada 109, Hassan 107, Kolar 103, followed by others.

Bengaluru urban district topped the list of positive cases, with 34,943 infections, followed by Dakshina Kannada 3,829 and Kalaburagi 2,966. Among discharges Bengaluru urban was on top with 7,476 discharges, followed by Kalabuagi 1,834 and Udupi 1,731.

A total of 10,64,734 samples were tested so far, out of which 43,904 were tested on Tuesday alone, the bulletin said. It said that 19,328 of the 43,904 samples tested today were rapid antigen tests.

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.