In the first study to use imaging technology to see what goes on in the brain when we scratch, researchers at Wake Forest University Baptist Medical Center have uncovered new clues about why scratching may be so relieving - and why it can be hard to stop. The work is reported online in the Journal of Investigative Dermatology and will appear in a future print issue.
"Our study shows for the first time how scratching may relieve itch," said lead author Gil Yosipovitch, M.D., a dermatologist who specializes in itch. "It's important to understand the mechanism of relief so we can develop more effective treatments. For some people, itch is a chronic condition that affects overall health."
The study involved 13 healthy participants who underwent testing with functional magnetic resonance imaging (MRI) technology that highlights areas of the brain activated during an activity. Participants were scratched on the lower leg with a small brush. The scratching went on for 30 seconds and was then stopped for 30 seconds - for a total of about five minutes.
One way diabetes is bad for your blood vessels is by creating too much competition for an amino acid that helps blood vessels relax, researchers say.
That amino acid, L-arginine, is broken down by the enzyme arginase to urea, which helps the body eliminate toxins resulting from the proteins we eat. Diabetics have a lot of arginase activity, which means they use a lot more L-arginine, says Dr. Maritza Romero, postdoctoral fellow at the Medical College of Georgia and lead author of the paper published in the current issue of Circulation Research.
It also means too little L-arginine is available to help nitric oxide synthase make nitric oxide, the powerful vasodilator that helps blood vessels relax, says Dr. Romero, who works in the lab of Dr. R. William Caldwell, chair of the MCG Department of Pharmacology and Toxicology and the study's corresponding author.
CBSThu, 31 Jan 2008 12:07 UTC
Undercover video shows sickened cows, too weak to walk, being jabbed with forklift blades, kicked, shocked and even sprayed in the face with powerful jets of water by workers at the Hallmark Meat Packing Company in Chino, California.
I.Q. testing not only damages the self-worth of many test-takers but it has denied millions of them the opportunity to better their educational and economic lot, a new book asserts.
Chicago - Mercury from vaccines seems to disappear rapidly from the blood, returning to pre-vaccination levels in one month, according to a small study of children in Argentina.
Los Angeles - The city that popularized the fast food drive-thru has a new innovation: 24-hour medical marijuana vending machines.
Apples, bananas, and oranges are the most common fruits in both Western and Asian diets, and are important sources of vitamins, minerals, and fiber. A new study in the Journal of Food Science explores the additional health benefits of these fruits and reveals they also protect against neurodegenerative diseases, including Alzheimer's Disease.
Why do some people solve problems more creatively than others? Are people who think creatively somehow different from those who tend to think in a more methodical fashion?
These questions are part of a long-standing debate, with some researchers arguing that what we call "creative thought" and "noncreative thought" are not basically different. If this is the case, then people who are thought of as creative do not really think in a fundamentally different way from those who are thought of as noncreative. On the other side of this debate, some researchers have argued that creative thought is fundamentally different from other forms of thought. If this is true, then those who tend to think creatively really are somehow different.
A new study led by John Kounios, professor of psychology at Drexel University and Mark Jung-Beeman of Northwestern University addresses these questions by comparing the brain activity of creative and noncreative problem solvers. The study published in the journal Neuropsychologia, reveals a distinct pattern of brain activity, even at rest, in people who tend to solve problems with a sudden creative insight -- an "Aha! Moment" - compared to people who tend to solve problems more methodically.
Adults with allergy symptoms report a high incidence of Irritable Bowel Syndrome (IBS), suggesting a link between atopic disorders and IBS according to a study published this month in Annals of Allergy, Asthma & Immunology,the scientific journal of the American College of Allergy, Asthma and Immunology.
In a study of 125 adults, Rush University Medical Center's Dr. Mary C. Tobin and colleagues found the likelihood of IBS was significantly higher in patients with seasonal allergic rhinitis (2.67 times), patients with allergic eczema (3.85 times), and patients with depression (2.56 times).
A 32 year-old man died from the deadly H5N1 bird flu strain in Jakarta on Wednesday, bringing Indonesia's death toll from the virus to 101, the Jakarta Post newspaper said.
According to a World Health Organization (WHO) report, the death is the third in the past three days as a 23 year-old woman and a nine-year-old boy died in hospital on Sunday.
