If  you sweat excessively, you’re likely to have sensitive skin as well, with new research confirming the two go hand-in-hand. A team led by Adam Friedman of George Washington University and Linqing Zhang of Virginia Tech used machine learning models to examine survey data from more than 600 people who sweat excessively. It uncovered a significant link excessive sweating — a condition known as primary hyperhidrosis — and sensitive skin. People with primary hyperhidrosis sweat four times more than needed to cool the body — even when they’re not exposed to high temperatures or exercising. The condition affects specific areas such as the hands, feet, face and armpits.  People with sensitive skin often experience itching, burning and tightness when exposed to heat, sweat, skincare products and stress.  Researchers found that folks with hyperhydrosis are more likely than most people to have sensitive skin. Sensitivity often goes beyond areas that sweat excessively, showing that perspiration isn’t the cause of their skin sensitivity. “Someone with primary hyperhidrosis is more likely to have sensitive skin than the general public, even in areas where there is no excessive sweating,” said Friedman, head of dermatology at GWU School of Medicine and Health Sciences.  Friedman’s team suspects the connection is more complex than has previously been recognized. They theorize that abnormal nerve signals connected to sweating may be involved. The study…  read on >  read on >

The head of a Princeton team that mapped the brain of an adult fruit fly — a watershed step in understanding the human brain — explains the feat in a way that belies its complexity. “Just like you wouldn’t want to drive to a new place without Google Maps, you don’t want to explore the brain without a map,” explained lead author Sven Dorkenwald, who received his Ph.D. last year from Princeton and is now at the Allen Institute for Brain Science in Seattle. “What we have done is build an atlas of the brain, and added annotations for all the businesses, the buildings, the street names.” With this, he added in a Princeton news release, “researchers are now equipped to thoughtfully navigate the brain as we try to understand it.”  Likening it to a roadmap that traces every tiny alley as well as every superhighway, he said the new map — called a “connectome” — shows connections in the fruit fly brain at every scale. It could one day lead to tailored treatments for brain diseases. Researchers described their work Oct. 2 in a special issue of the journal Nature.  They created a neuron-by-neuron and synapse-by-synapse map of the brain of an adult fruit fly (Drosophila melanogaster). It identifies different types of neurons and chemical links — or synapses — between them and offers…  read on >  read on >

Scientists say they’ve discovered a protein that seems crucial to the onset of age-related macular degeneration (AMD), a common cause of blindness in older people. The research is in its very early stages, but it might help lead to the first effective therapy against the vision-robbing illness, which affects up to 15 million Americans. “Current treatments for AMD have limited efficacy and often come with significant side effects,” said study lead author Ruchira Singh. “Our research aims to identify novel therapeutic targets that could potentially halt the progression of this disease,” said Singh, who is associate professor of ophthalmology at the University of Rochester in New York. With AMD, a portion of the eye’s retina, called the macula, undergoes progressive damage. This typically means a person loses central vision, while retaining the ability to see things on the periphery. There are currently no treatments that can stop AMD, which the American Academy of Ophthalmology says is the leading cause of blindness in people over the age of 50. What causes AMD has long remained unclear. What is known is that a layer of cells at the back of the eye, called the retinal pigment epithelium (RPE), is central to the illness. A buildup within the RPE of fats and proteins, called drusen, is a hallmark of early-stage AMD In their new study, Singh’s team bypassed…  read on >  read on >

Patients who lose the use of their hands and arms after a stroke or traumatic brain injury could regain some function through deep brain stimulation (DBS), new research demonstrates. DBS involves surgical placement of electrodes to deliver electrical impulses to areas of the brain regulating specific activity. It is often used to treat control movement problems associated with Parkinson’s disease. “Arm and hand paralysis significantly impacts the quality of life of millions of people worldwide,” said corresponding author Elvira Pirondini, an assistant professor of physical medicine at the University of Pittsburgh. “Currently, we don’t have effective solutions for patients who suffered a stroke or traumatic brain injury, but there is growing interest in the use of neuro-technologies that stimulate the brain to improve upper-limb motor functions.” The team proposed using DBS to stimulate a structure deep within the brain called the motor thalmus, a key hub of movement control. Because this had never been done before, they first tested it in monkeys, which have the same links as people between the motor cortex and muscles. As soon as the stimulation was turned on, the monkeys had significantly better muscle activation and grip. No involuntary movement was seen. Then, they repeated the procedure using the same stimulation settings in a human volunteer who was already set to undergo DBS implantation to help with arm tremors caused…  read on >  read on >

Food left in the stomach or stool left in the bowel can impede a doctor’s ability to successfully perform an endoscopy or colonoscopy. Now, research finds this scenario is more likely if the patient is taking popular new weight-loss meds such as Ozempic, Wegovy, Mounjaro or Zepbound. For these patients, “inadequate bowel preparation was more common” before endoscopy or colonoscopy, according to researchers led by Dr. Ruchi Mathur. She’s an endocrinologist and gastrointestinal researcher at Cedars-Sinai in Los Angeles. Mathur’s team published its findings Oct. 1 in the journal JAMA Network Open. As the researchers noted, prior studies have suggested that people taking GLP-1`medications might face a higher odds of “aspirating” food when undergoing procedures requiring anesthesia. Because the drugs can also cause constipation and a delayed emptying of the stomach, Mathur’s group wondered if the meds might leave residues in the digestive tract that could interfere with the clarity of endoscopic procedures. To find out, they looked at endoscopies and colonoscopies performed on 209 patients who were all overweight or obese (mean BMI of about 34) and averaging about 63 years of age. Seventy of the participants were taking a GLP-1 medicine, with almost half of that group taking Ozempic or Wegovy. The other 139 participants were not taking a GLP-1 med. For 23 folks undergoing an esophagogastroduodenoscopy (EGD), where a camera is snaked through…  read on >  read on >