Health

When Augustin Lignier, a professional photographer in Paris, was in graduate school, he began to ponder the point of picture-taking in the modern world: Why did so many of us feel compelled to photograph our lives and share those images online?It was not a novel question, but it led Mr. Lignier to a surprising place, and before long he found himself building what was, in essence, a photo booth for rats.He took inspiration from B.F. Skinner, the famous behaviorist who had devised a test chamber to study learning in rats. The Skinner box, as it became known, dispensed food pellets when rats pushed a designated lever.It became one of the most well-known experimental paradigms in psychology. Scientists found that reward-seeking rats became lever-pressing pros, pushing the bar down over and ove...

Last Thanksgiving, Cynthia Mosson had been on her feet all day in her kitchen in Frankfort, Ind., preparing dinner for nine. She was nearly finished — the ham in the oven, the dressing made — when she suddenly felt the need to sit down.“I started hurting in my left shoulder,” said Ms. Mosson, 61. “It got really intense, and it started to go down my left arm.” She grew sweaty and pale and told her family, “I think I’m having a heart attack.”An ambulance sped her to a hospital where doctors confirmed that she had suffered a mild heart attack. They said testing revealed serious blockages in all her coronary arteries and told her, “You’re going to need open-heart surgery,” Ms. Mosson recalled.When such patients head into an operating room, what happens next has a lot to do with their sex, a re...

For decades, Uganda’s campaign against H.I.V. was exemplary, slashing the country’s death rate by nearly 90 percent from 1990 to 2019. Now a sweeping law enacted last year, the Anti-Homosexuality Act, threatens to renew the epidemic as L.G.B.T.Q. citizens are denied, or are too afraid to seek out, necessary medical care.The law criminalizes consensual sex between same-sex adults. It also requires all citizens to report anyone suspected of such activity, a mandate that makes no exceptions for health care providers tending to patients.Under the law, merely having same-sex relationships while living with H.I.V. can incur a charge of “aggravated homosexuality,” which is punishable by death.Anyone who “knowingly promotes homosexuality” — by hiring or housing an L.G.B.T.Q. person, or by not repo...

King Charles III will have a procedure to address an enlarged prostate at a hospital next week. The 75-year-old British monarch’s diagnosis is common among men his age, and experts say that typical treatments are not dangerous.An enlarged prostate, known also as benign prostatic hyperplasia, or BPH, is a noncancerous condition that occurs frequently among older men. By age 60, more than half of men have at least mild BPH symptoms, which include difficulty urinating and a sense of urgency to urinate. But often the symptoms are not severe enough to require treatment.The condition is analogous to menopause in women, said Dr. Peter Albertsen, a urologist and prostate specialist at the University of Connecticut. Menopause usually begins around age 50 when levels of testosterone and estrogen sta...

There is a problem with the recently approved Alzheimer’s drug, Aduhelm. It can remove some of the amyloid that forms brain plaques that are hallmarks of the disease. But most of the drug is wasted because it hits an obstacle, the blood-brain barrier, that protects the brain from toxins and infections but also prevents many drugs from entering.Researchers wondered if they could improve that grim result by trying something different: they would open the blood-brain barrier for a short time while they delivered the drug. Their experimental method was to use highly focused pulses of ultrasound along with tiny gas bubbles to pry the barrier open without destroying it.The investigators, at the Rockefeller Neuroscience Institute at West Virginia University, reported their results last week in Th...

The Quaker Oats Company added more products this week to a recall that started last month over possible salmonella contamination, raising the total number of products to more than 60.Quaker Oats, which is owned by PepsiCo, initially recalled 43 products, including granola bars, cereals and various snack foods. On Thursday, the company added 24 products to the list.The newly recalled items include Quaker Chewy Granola Bars, Gatorade protein bars, Cap’n Crunch bars, Quaker Simply Granola Cereals, Gamesa Marias Cereal and other cereals.“To date, Quaker has received no confirmed reports of illness related to the products covered by this recall,” the U.S. Food and Drug Administration said in December. It is unclear if any illnesses have been reported since then.It was not immediately clear how ...

Marijuana is neither as risky nor as prone to abuse as other tightly controlled substances and has potential medical benefits, and therefore should be removed from the nation’s most restrictive category of drugs, federal scientists have concluded.The recommendations are contained in a 250-page scientific review provided to Matthew Zorn, a Texas lawyer who sued Health and Human Services officials for its release and published it online on Friday night. An H.H.S. official confirmed the authenticity of the document.The records shed light for the first time on the thinking of federal health officials who are pondering a momentous change. The agencies involved have not publicly commented on their debates over what amounts to a reconsideration of marijuana at the federal level.Since 1970, mariju...

In late 2019, scientists began searching for 10,000 Americans willing to enroll their pets in an ambitious new study of health and longevity in dogs. The researchers planned to track the dogs over the course of their lives, collecting detailed information about their bodies, lifestyles and home environments. Over time, the scientists hoped to identify the biological and environmental factors that kept some dogs healthy in their golden years — and uncover insights about aging that could help both dogs and humans lead longer, healthier lives.Today, the Dog Aging Project has enrolled 47,000 canines and counting, and the data are starting to stream in. The scientists say that they are just getting started.“We think of the Dog Aging Project as a forever project, so recruitment is ongoing,” said...

The start of the new year often brings lofty ambitions.It’s 2024 — time to exercise and eat better, says a nagging voice, somewhere deep in your brain. What about learning to knit?It’s enough to make anyone feel anxious.For those who already struggle with anxiety, these heightened expectations can be even more distressing. Especially because research suggests that many of us don’t complete our New Year’s resolutions.So we asked several psychologists for resolutions specifically tailored to people with anxious tendencies. And we broke them down into bite-size steps so you can notch your successes along the way.But don’t feel pressure to tackle these tips just because it’s January.“It’s OK to take stock of your life at any moment and say, ‘Hey, what can I do differently?’” said Regine Galant...

The Food and Drug Administration has allowed Florida to import millions of dollars worth of medications from Canada at far lower prices than in the United States, overriding fierce decades-long objections from the pharmaceutical industry.The approval, issued in a letter to Florida Friday, is a major policy shift for the United States, and supporters hope it will be a significant step forward in the long and largely unsuccessful effort to rein in drug prices. Individuals in the United States are allowed to buy directly from Canadian pharmacies, but states have long wanted to be able to purchase medicines in bulk for their Medicaid programs, government clinics and prisons from Canadian wholesalers.Florida has estimated that it could save up to $150 million in its first year of the program, i...