Medicine News

According to Siencedaily.com Studying there are correlations between increases in both soluble and plaque-forming beta-amyloid -- a protein implicated in the Alzheimer's disease process -- and dysfunctional developments on several levels: individual cortical neurons, neuronal circuits, sensory cognition, and behavior.

The results has been published in Nature Communications, ingshow changes progress in parallel and that, together, they reveal distinct stages in Alzheimer's disease with a specific order in time.
Lyme Disease

Man's brain starts to decline in late 20s, studies say. Yeas, a new study on aging indicates that reasoning, speed of thought and spatial visualization begin to decline in that age, the BBC reports.
Professor Timothy Salthouse of Virginia University, who worked on the research, said: "Results converge on a conclusion that some aspects of age-related cognitive decline begin in healthy, educated adults when they are in their 20s and 30s."



In the study, the BBC says, Salthouse had his subjects solve puzzles, recall words and details of stories, and spot patterns in letters and symbols. In nine out of 12 tests, the BBC says, 22 was the average age for peak performance. Marked decline began at 27.

It means that just the findings could mean that therapies designed to slow or reverse the aging process may need to start much earlier.

Alexandra Burt, PhD, of Michigan State University asserts that "The idea is that your genes predispose you to certain behaviors, and those behaviors elicit different kinds of social reactions from others," Burt said in a news release. "And so what's happening is your genes are to some extent driving your social experiences."



Studies of a gene that affects brain levels of the chemical messenger serotonin (the 5HT2A serotonin-receptor gene) are supporting this theory.

Sightist assembled more than 200 college men with an average age of 19 into two groups. One group met together to plan a party on a strict budget; the other met to plan a party for which the sky was the limit. Immediately after the planning session, individuals rated their peers on popularity. They also gave a DNA sample.

"So the gene predisposed them to rule-breaking behavior, and their rule-breaking behavior made them more popular," Burt says.

Last researches have showed that a genetic test might determine which sports, like sprinting or football, or endurance sports like distance running, or a combination of the two, maximally suit the talents of your 2 ½-year-old kids?



“I could see how some people might think the test would pigeonhole your child into doing fewer sports or being exposed to fewer things, but I still think it’s good to match them with the right activity,” Ms. Campiglia, 36, said as she watched a toddler class at Boulder Indoor Soccer in which Noah struggled to take direction from the coach between juice and potty breaks.

“I think it would prevent a lot of parental frustration,” she said.

It was discovered the link between ACTN3 and athletics. Actually the process of testing is very easy. Dr. Roth called ACTN3 “one of the most exciting and eyebrow-raising genes out there in the sports-performance arena,” but he said that any test for the gene would be best used only on top athletes looking to tailor workouts to their body types.

Two regions of the brain linked to optimism have been discovered by researchers, newscientist.com reported. Brain scans obtained using functional magnetic resonance imaging (fMRI) revealed that reflecting on both past and future events activated the amygdala and the (rACC) areas, both of which sit deep in the middle of the brain. However, positive events – and particularly those imagined in the future – elicited a significantly bigger brain response in these regions than reflecting on negative events. The identification of the sites that signal positive thinking could shed light on the causes of depression, they say.

The US team says that the act of imagining a positive future event – such as winning an award or receiving a large sum of cash – activates two brain areas known as the amygdala and the rostral anterior cingulated cortex (rACC). The finding lends weight to earlier studies that suggested these brain regions malfunction in depression and hint at new ways of diagnosing the disorder.

Elizabeth Phelps at the New York University, US, and colleagues measured how optimistic 15 volunteers were using a standard questionnaire. The researchers then asked these subjects to lie in a brain scanner and reflect on one of a number of potential scenarios.

For example, in one part of the trial, subjects followed specific instructions to recall a negative event in the past, such a funeral attended in the past five years. In another part of the experiment they had to imagine what it would be like to be involved in a car crash in the near future. At other points in the study subjects had to reflect on positive events such as winning an award in the past or receiving a large sum of cash in the future.

Researchers led by Catherine Noblet of Rouen University Hospital identified 96 cases of tendon complications from the French Pharmacovigilance database between 1990 and 2005 that were attributed to statins,sciencedaily.com reports.

The researchers were able to link the tendon problems to statin use because symptoms appeared after the statins were started and improved when the statins were stopped.

"Our study suggests that regular tendon clinical examination may be required in statin-treated patients, particularly during the first year following statin therapy initiation," the study authors said in a statement.

Tendon conditions -- including tendonitis and tendon rupture -- usually occurred within eight months of beginning statin therapy. The most common tendon affected was the Achilles tendon, with pain, swelling, warmth and stiffness the most common symptoms.