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-- and its wider implications for human mental health treatment -- was found in their poop, per new findings published in Behavioural Brain Research.Rats are better drivers when they're mentally stimulatedKelly Lambert, study author and head of the University of Richmond's Lambert Behavioral Neuroscience Laboratory, trained two groups of young rats: One bunch raised in an "enriched environment" with toys, ladders, balls and pieces of wood designed to spark mental stimulation, and another reared in a standard, unexciting lab cage.The rats learned to enter a custom "rat-operated vehicle," or ROV, adorably constructed from a one-gallon plastic container turned on its side.Once inside, the rat racers would stand on an aluminum plate and press on a copper bar that would trigger the wheels' motor. They'd hold down on the bar until they propelled their tiny car to the end of their enclosure, where they collected their reward: Froot Loops.When it came time to drive, the rats who played with ladders, balls and toys were more adept at operating and steering the ROV, thanks to the neuroplasticity (their brains' ability to change over time) triggered by their environment. Their unstimulated cage counterparts effectively "failed their driving test," Lambert said.Hormones found in their feces showed improved emotional resilienceIn sifting through their fecal matter, Lambert found both groups of rats trained to drive secreted higher levels of corticosterone and DHEA, hormones that control stress responses.Corticosterone is a hormone animals could secrete in high-stakes scenarios like running from a wild animal or defending themselves from predators, but it can also be expressed in lower-risk tasks like doing taxes or worrying about a loved one (though rats likely aren't advanced enough to form a government, let alone impose taxes on fellow rats).DHEA acts as a sort of "buffer," Lambert said, when corticosterone becomes toxic -- that is, when it can't be turned off in a reasonable amount of time, creating prolonged stress.It's evidence that mastering a complex task, like driving a car, bolstered the rats' emotional resilience."It is likely that driving gives the rats a sense of control over their environment," she said. "In humans, we would say that it enhances a sense of agency or self-efficacy."What have rats got to do with human health?The brains of humans and rats share nearly all of the same areas and neurochemicals -- they're just smaller in rodents. And though humans are certainly more complex than rats, Lambert said there are "universal truths" in how both species' brains interact within their environment to maintain optimal mental health.So these results have implications for human health, too (and no, they don't mean rats will drive alongside people in tiny lanes on highways). Emotional resilience is one of the first lines of defense against mental illnesses like depression, she said, and learning what behaviors build that up could clue physicians in on how to treat those illnesses in humans.It's a concept Lambert refers to as "behaviorceuticals," activities that release hormones that can ward off prolonged stress brought on by corticosterone."Anything that reduces stress can build resilience against the onset of mental illness," she said.The activity can be something as simple as knitting, or in rats' case, learning to drive a car. Just engaging hands, paws and brains of varying sizes can enhance a participant's sense of control. 3489

It’s all in support of Terell Jensen, an 18-year-old who is now paralyzed in his hands and legs after a sledding accident.The last time he could walk and fully use his hands was Nov. 24, when his family was out near Strawberry Reservoir looking for their Christmas tree. “I was being pulled behind an ATV and I just got flung and went into the little ditch,” Terell said. Hitting his back on a rock, the accident left him paralyzed. “Mentally, it’s really tough sometimes, and you really have to push yourself to stay positive,” he said. Kari Jensen, Terell's mother, said it was a miracle they had cellphone service when the accident happened and that the helicopter was able to pick her son up. 698

YOSEMITE NATIONAL PARK, Calif. (AP) — No employee or resident has tested positive at Yosemite National Park's health clinic, and no visitors have reported being sick since the park began reopening last month, but tests of the park's raw sewage have confirmed the presence of the virus. Dozens of people are believed to have been infected. The public health officer for Mariposa County, who is overseeing coronavirus testing in the Yosemite area, said the emergence of the coronavirus will not likely lead to policy changes because the park is already following local and state restrictions. Eric Sergienko said he believes the confirmed presence of the virus in Yosemite will make people more vigilant. 710

With TikTok facing just one more day before a US-imposed ban on downloads of the popular app, President Donald Trump said Saturday that he will allow a deal that will allow the Chinese-owned service to be used in the US.While details of the possible transfer of TikTok to Oracle are not known, Trump said the deal has his blessing.“I have given the deal my blessing. If they get it done that’s great; if they don’t, that’s fine too,” Trump told reporters.Trump has cited privacy concerns for taking the action against the social media network.TikTok has gained popularity among younger Americans in recent months for its short, entertaining video clips. The TikTok community has often been critical of Trump. Earlier in the summer, users of TikTok organized by reserving tickets to Trump’s rally in Tulsa, which failed to draw the type of crowds the Trump campaign expected.The Trump administration has complained that the application takes data and is used by the Chinese government."All the things that you care that you want to make sure the Chinese Communist Party doesn’t have, we have a responsibility to make sure that the systems that you’re using don’t give them access to that," US Secretary of State Mike Pompeo said in July. 1244

in downtown Indianapolis.The vehicle apparently fell from the fourth story of the Market Square Center Garage and landed on its roof in an alley behind the City Market.According to the Indianapolis Fire Department (IFD), a man and woman inside the vehicle, were killed.The vehicle fell shortly before 10 a.m. Wednesday. It wasn't immediately clear how the vehicle fell from the garage.IFD shared photos and video of the scene, showing the mangled car and blown out wall of the parking garage. 495