The nation wants to know: Why did Arnab quit as editor-in-chief of Times Now?

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.

Bengaluru, Jun 21: As many as 453 new coronavirus cases were confirmed on Sunday including 196 in Bengaluru alone, taking the total number of infections in Karnataka to 9,150, the Health Department said.

Five more deaths took the toll due to COVID-19 in the state to 137, a bulletin issued by the department said.

An assistant sub-inspector posted in a traffic police station died due to coronavirus on Saturday night taking the number of policemen succumbing to the contagion to three, police said.

The entire police station has been sealed for sanitisation and 25 people including five primary contacts of the deceased have been quarantined at the designated hospitals.

The total number of COVID-19 cases include 5,618 discharges, 3,391 active cases, 137 deaths, four deaths due to non-COVID causes and 77 patients admitted in Intensive Care Units.

The 196 cases confirmed in Bengaluru today is the highest single-day spike ever since the outbreak of the pandemic.

With 64 deaths so far, the city's share in the total fatalities in the state due to COVID is 47 per cent.

The five deaths reported on Sunday included three in Bengaluru.

"Yes. It is a major single day spike in Bengaluru," a health department official told P T I.

Of the total cases reported in Bengaluru, 101 are Influenza-Like Illness (ILI) and 68 are those whose contact tracing is underway.

Apart from 196 in Bengaluru, 40 cases were reported in Ballari, 39 cases each in Kalaburagi and Vijayapura, 18 each in Mysuru and Gadag, 15 in Dharwad, 14 in Bagalkote, 13 in Bidar, eight each in Davangere, Uttara Kannada and Kolar.

The five deaths reported on Sunday consisted of four men and a woman.

In view of the rising cases in Bengaluru, the Chief Secretary on Saturday formed three teams.

According to an order, Principal Secretary in Cooperative department Tushar Girinath will head the team that will ensure shifting the patients from their houses or the institutional quarantine facilities to the designated hospital.

The second team headed by the Karnataka Public Service Commission secretary G Sathyavathi will monitor the containment zone and carry out extensive surveys of people with COVID-19.

The third team is headed by Karnataka State Mineral Development Corporation managing director Naveen Raj Singh and Additional Commissioner of police Hemant Nimbalkar who will ensure social distancing at public places.

These three teams will have senior bureaucrats and top police officers as members.

Bengaluru, Apr 16: With two more people testing positive for COVID-19 in Karnataka, the state's corona cases count has reached 279, including 80 discharged and 12 deaths, said the government on Wednesday.

A total of 19 corona cases were confirmed in the state on Wednesday. 17 cases were reported earlier in the day, of which 15 are male patients and two are female. Of the 17 cases, nine are workers of a pharmaceutical company in Mysuru, the government stated.

Meanwhile, a 65-year-old from Chikkaballapur, who had tested positive for COVID-19, lost his life this afternoon.

"He was referred to a Bengaluru hospital with complaints of H1N1 positive, chronic obstructive pulmonary disease with obstructive sleep apnea and a past history of diabetes and hypertension," the government said.