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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

Tom Steyer is spending another million to put a second anti-Donald-Trump advertisement on national television -- this time taking aim at the President's tax overhaul push.The ad comes less than a month after the Democratic mega-donor and billionaire environmentalist spent million on a one-minute ad calling for Trump's impeachment.The second installment of Steyer's anti-Trump ad campaign begins Thursday with a spot filmed on Steyer's ranch in Pescadero, California. 484

THORNTON, Colo. – Police have arrested the suspect in a deadly shooting at a Thornton Walmart store.Scott Ostrem, 47, was taken into custody Thursday morning at 72nd and Federal.Witnesses told Thornton Police that Ostrem "nonchalantly" walked into the store Wednesday night, took out a handgun and began firing randomly at people. Two men and a woman were killed."This is a very heinous act," Avila said. "We don't know exactly what the motive of the person was, but it was certainly a terrible act."IMAGES | Photos capture chaotic scene after Thornton Walmart shootingPolice originally reported "multiple parties are down" after they were called around 6 p.m. to the store located at 9901 Grant Street in Thornton. The store was evacuated as authorities arrived on scene.Police found the victims in the south entrance. The two men were pronounced dead at the scene. The female victim was transported to Denver Health where she later succumbed to her injuries. Authorities have yet to identify the victims.No other physical injuries were reported. However, police say several people received medical attention for anxiety. Several distraught employees could be seen in the parking lot comforting each other.Investigators say there is no indication that terrorism was a motive, but have not ruled anything out at this point. They are still interviewing hundreds of witnesses and going through surveillance video.Special agents with the Bureau of Alcohol, Tobacco, Firearms and Explosives were helping police in the investigation.The shooting at the busy shopping center forced customers to either hide in the store or frantically run for the doors.Witness Harold Stevens said he was in the store with his son when he heard at least three shots. He said an employee directed him and his son to a back door where they were able to escape safely. 1890

Three different storm systems are threatening different parts of the United States and the Caribbean this weekend.Hanna becomes hurricane as it bears down on TexasHurricane Hanna made landfall on Texas’ Padre Island Saturday afternoon. The National Hurricane Center says the storm made landfall about 15 miles north of Port Mansfield with maximum winds of 90 mph.Hurricane #Hanna made landfall on Padre Island, Texas at 5 PM CDT with maximum sustained winds of 90 mph. Visit https://t.co/tW4KeFW0gB for details. pic.twitter.com/yIT12pXwjp— National Hurricane Center (@NHC_Atlantic) July 25, 2020 Hanna was upgraded to a hurricane Saturday morning as it moved toward the Texas coast, becoming the first hurricane of the Atlantic's 2020 season.Meteorologists say the biggest concern from Hanna is expected to be flash flooding. Up to a foot of rain and storm surge up to 5 feet is forecast for some areas.Local officials on Saturday asked residents to stay home and ride out the storm, but to also be mindful of the coronavirus pandemic.Officials said Friday that they were confident they'd be able to cope with the one-two punch of the storm and the state's surge in COVID-19 cases.Hurricane Douglas bears down on HawaiiHurricane Douglas in the Pacific Ocean is presenting new challenges to officials in Hawaii who are long accustomed to tropical storms.Meteorologists say Douglas should weaken by the time it hits Hawaii with strong winds, heavy rainfall and dangerous surf beginning Saturday night.Honolulu authorities are preparing extra shelter space so people can maintain physical distance from others during the COVID-19 pandemic.Evacuees at Honolulu shelters will have their temperatures taken. Those with high temperatures or with a travel or exposure history will either be isolated at that shelter or taken to a different site. Officials are also reminding residents to make sure they have masks and hand sanitizers in their emergency supply kits.President Donald Trump issued an emergency declaration for Hawaii on Saturday because of Douglas, directing federal assistance to supplement state and local response efforts.The National Weather Service on Saturday issued a hurricane warning for the island of Oahu, where the state’s largest city, Honolulu, is located.Hurricane #Douglas Advisory 22: Hurricane Douglas Continues to Move West-Northwest Toward Hawaii. Hurricane Warning Issued For Oahu. https://t.co/mbw53QNBXE— NHC Eastern Pacific (@NHC_Pacific) July 25, 2020 Maximum sustained winds decreased to about 90 mph by midday Saturday, making Douglas a Category 1 hurricane. The storm is expected to be near the main Hawaiian islands late Saturday and move over the state Sunday and Monday.Tropical Storm Gonzalo to move through CaribbeanTropical Storm Gonzalo is still on track to move across the southern Windward Islands later Saturday.Tropical Storm #Gonzalo Advisory 15A: Heavy Rain From Gonzalo Nearing Trinidad and Tobago. https://t.co/VqHn0u1vgc— National Hurricane Center (@NHC_Atlantic) July 25, 2020 Gonzalo is forecast to bring 1 to 3 inches of rain, with isolated totals of 5 inches.A tropical storm warning was in effect for Tobago and Grenada and its dependencies.The storm was expected to dissipate by Sunday night or Monday, forecasters said. 3284

To save eagles, some hunters have stopped using lead ammunition. The Fontenelle Forest Raptor Recovery has seen an increase in the amount of eagles and other birds coming in with lead poisoning.So far this year, nine eagles have been treated at the center; only three remain alive after intense treatments.This sights of this iconic bird being poisoned by lead-based ammo has some hunters thinking twice before buying lead.Kent Walton is an avid hunter who lives in Papillion, Nebraska. He said he's been hunting his whole life and will not buy lead-based ammo because of its affects on these birds."I made the switch to non-toxic shot, steel, tungsten, bismuth and those types of things, and that's what I use now in the field," he said.Many hunters said they chose lead because it's cheaper, and because they believe it makes their shot more accurate. Walton disagrees: "I don't see any difference in performance."This mission tugs at Walton's heartstrings because he also helps bring birds into Raptor Recovery when they are sick or injured. "It's not pretty," he said. "It's very sick, and it takes a lot to get them back on their feet, if you can."Walton hopes other hunters will take his lead."If you love to see the eagles soaring overhead and you love the fact they are coming back to Nebraska, there's more and more nests here then there were last year," he said. "That's why you should care: It's bringing them back and keeping them from getting that lead positioning." 1512