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Their youthful brains were developing normally, with no signs of developmental, psychological or neurological problems. None had ever had a concussion. But by the end of a single football season, 24 children between the ages of 9 and 18 who had more frequent impacts to the head showed signs of damage to brain development, new research says."Repetitive head impact exposure may have a cumulative effect in the rapidly developing brains of youth and high school football players," said study co-author Gowtham Krishnan Murugesan, a radiology research assistant at UT Southwestern Medical Center in Dallas, adding that the results mirror other recent findings.The study outfitted 60 youth and high school football players who had no history of head trauma or developmental issues with a head impact telemetry system that measures the magnitude, location and direction of impacts to the head. The researchers were not looking at whether the impact resulted in a concussion, only that impact occurred.The children were sorted into two categories: high cumulative head impact players (24) and low cumulative head impact players (36).Before beginning to play, each child had a resting state functional scan, known as an fMRI; the scans were repeated at the end of football season. The researchers were trying to see how exposure to repetitive hits affects the normal "pruning" process in the brain that occurs during adolescence."Pruning is an essential part of brain development," Murugesan said, comparing the process to how a tree needs to have dead or unneeded branches cut to keep it healthy and allow it to grow."Disruption in normal pruning has been shown to be related to weaker connections between different parts of the brain," he said.After comparing the functional MRI results to the player's level of impact, the researchers found that youth in the high-impact group had damage to their brains' pruning process after one season."Our study has found a significant decrease in gray matter pruning in the frontal default mode network, which is involved in higher cognitive functions, such as the planning and controlling of social behaviors, " Murugesan said.Although the "teenage years are a critical time for brain development, brain remodeling or synaptic pruning, this was a short-term study and did not follow the players longitudinally over several years. We don't really know the full application," said Dr. Julian Bailes, director of neurosurgery and co-director of the NorthShore University HealthSystem Neurological Institute, who was not involved in the research.Weill Cornell neurologist Dr. Richard Isaacson, who was also not involved in the study, called the research "early" and said the results don't necessarily "translate to a clinical or cognitive outcome." More research is needed to see whether the decline in brain pruning permanently affected the child's cognitive function or whether the brain's natural plasticity allowed it to repair itself."I would call this a pilot study," Isaacson said. "The call to action would be that we need more robust longitudinal studies with a pre- and a post-assessment of more than brain imaging. The study should also measure cognitive and neurological function and look for changes."As we learn more about the issue, Isaacson said, parents should do everything they can to limit contact in sports, "especially in practice before games, where studies show the majority of contact occurs." 3464

Three UCLA basketball players accused of shoplifting in China last week were flying back to Los Angeles on Tuesday, the commissioner of the Pacific-12 athletic conference said, hours after US President Donald Trump said he asked his Chinese counterpart to help in the case.The three freshmen -- LiAngelo Ball, Cody Riley and Jalen Hill -- were allowed to leave China on the US-bound flight after the situation was "resolved to the satisfaction of the Chinese authorities," said Larry Scott, commissioner of the Pac-12 Conference, of which UCLA is a member."We are all very pleased that these young men have been allowed to return home to their families and university," Scott said in a news releaseThe three were arrested last week while their team was in the Chinese city of Hangzhou ahead of the squad's season opener in Shanghai. They were questioned on suspicion of stealing sunglasses from a Louis Vuitton store near their hotel.The trio stayed at the hotel, reportedly awaiting next steps in their case, while their teammates went to Shanghai, where UCLA defeated Georgia Tech 63-60 on Saturday. The three also remained in China as their team returned to the United States over the weekend.Scott did not say how the case was resolved; a conviction of grand larceny in China could result in years of prison. But Trump said Tuesday that he had asked Chinese President Xi Jinping to help.UCLA's trip coincided with Trump's two-day state visit to the Chinese capital, Beijing, as part of his 13-day trip to Asia. Trump told reporters Tuesday that Xi had been helpful in working to resolve the case.Scott acknowledged Trump, among others, in his statement."We are grateful for the role that our Chinese hosts played, and for the courtesy and professionalism of the local authorities," Scott said. "We also want to acknowledge UCLA's significant efforts on behalf of their student-athletes."Finally, we want to thank the President, the White House and the US State Department for their efforts towards resolution."Trump's request was first reported by the Washington Post.  2086

TIJUANA, Mexico, Calif. (KGTV) -- Four people were injured after part of a hotel just south of the border exploded Monday morning. Televisa, citing Mexican authorities, says the explosion happened at Hotel Campamento, which is located about half a mile behind Las Americas Premium Outlets, around 11:20 a.m. Televisa reports that four people were injured, three of them with third-degree burns. Two of those injured are said to be in critical condition. RELATED: U.S. truck strikes vendors at Tijuana border crossingDue to high levels of gas in the area, 24 businesses surrounding the hotel, along with two other hotels, had to be evacuated, forcing 116 people out, Televisa reports. At this time, it’s unclear what caused the explosion, but a gas company that serves the area was called in to help authorities with the investigation, according to Televisa. 866

This year is already one of the most active for Atlantic storms and hurricanes. Now, the National Weather Service says, as if 23 named storms were not enough, there is a “zombie tropical storm.”NWS tweeted about the phenomenon Tuesday morning. “Because 2020, we now have Zombie Tropical Storms. Welcome back to the land of the living, Tropical Storm Paulette.” 368

This combination of photos provided by the Hennepin County Sheriff's Office in Minnesota on Wednesday, June 3, 2020, shows Derek Chauvin, from left, J. Alexander Kueng, Thomas Lane and Tou Thao. Chauvin is charged with second-degree murder of George Floyd, a black man who died after being restrained by him and the other Minneapolis police officers on May 25. Kueng, Lane and Thao have been charged with aiding and abetting Chauvin. (Hennepin County Sheriff's Office via AP) 483