Tuesday, August 23, 2011

Procedural same memories


Had no effect on the smell of roses and memorization of the material in case it gave the subjects after the training, but also to sleep - during waking hours.

Finally, it was found that did not make sense to give the smell of roses continuously through the night in a row (although he then found himself from time to time and to the right, slow phase of sleep). The fact that a person becomes accustomed to the constant smell and no longer notice it.

But to get to the desired phase of sleep researchers have been easy, since the experimental sleep in the laboratory and, accordingly, it was attached monitor brain activity.

Interestingly, this effect works only with the roses so-called declarative memories, how to include pictures and maybe the word. That is, memories of their own motor actions are not subject to this influence, say the authors of the work.



The question arises - is it possible for the night recalling the lesson to use other stimuli - sound, shall we say? Can not exclude it. That's only the "flavors are particularly suited for such an experience, as they are, firstly, it is extremely effective evoke memories, and, secondly, do not have hardly any disturbing effect on sleep itself," - written by German researchers.

But, you, who dare to expose for the sake of the session under the current head? Albeit weak. So, students prepare armfuls of roses. Just do not forget about the phase of sleep, when his dream, and the need to "paint" in pink.

Monday, August 22, 2011

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Friday, August 19, 2011

Open the mechanism of action of ginkgo on the brain


Has a healing effect on the brain. This plant was used in ancient China, it is used today. But it confirmed the healing properties of little research. Pursuing the study of strokes, a scientist and his colleagues found a mechanism that would deal with the consequences of stroke. They found that mice that lack the enzyme heme observed-oxygenase, poorly restored after a stroke.

This enzyme converts heme (iron-containing compound, a part of many proteins), creating dangerous oxygen radicals, the heme-oxygenase, which - on the contrary, neutralize oxygen radicals. Based on existing studies, Dr. Dore and co-workers made the assumption that increase production of heme-oxygenase and ginkgo may protect brain cells thereby.

To test this idea, they first performed experiments with neurons of the brain, taken from mouse embryos. It was found that cells found in the extract of Ginkgo biloba, less exposed to oxygen radicals than those that were in the normal environment. It is important that very high doses of Ginkgo biloba extract cells provide virtually complete protection.

In the next stage researchers took three groups of living mice. In the first group - mutant mice in which the nature of the heme-oxygenase elaborated a little. The second and third groups - normal mice. First and second group of experiments gave for ginkgo, and the third was a control. After that, all the mice artificially cause a stroke and compared the results.

It was found that mice from the first group to feel worse than rodents in the second. This confirmed the role of heme-oxygenase in the development of stroke. In addition, mice that were not given ginkgo, recovered equally worse than mice in the second group. Thus, the experiment has certified the useful effect of the investigated plants.

These experiments have confirmed the usefulness of rigorous scientific and ginkgo has shown that this herb is a potent neuroprotective.


Thursday, August 18, 2011

Molecular forces win the degeneration of nerve


An amazing coincidence - almost at the same time, there are two independent studies that offer new and effective methods of "molecular wars" against the damaging nerve diseases. In the center of attention of specialists in both cases proved to be axons, which are usually the first victim of the disease.

Who found a molecule that plays a key role in the successful operation of axonal transport , movement through the nerve appendage of different biological material. It is essential to preserve the life of nerve cells, and even more so, professionals can now take a fresh look at the factors leading to such disorders of the nervous system, as, for example, multiple sclerosis.

We explain the characteristic feature of neurodegenerative diseases - the loss of viable neurons, which, as experience shows, often preceded by degeneration of axons. Their destruction was detected repeatedly in many disorders of this type, but until now the phenomenon itself has not been studied in detail.

Degenerated neurons after the injections made by the scientists began to grow and returned to normal. Axonal transport provides uninterrupted traffic of thousands of biochemical compounds essential for the survival of the axons themselves and the success of our one hundred billion nerve cells.

Wednesday, August 17, 2011

Beautiful people - selfish?


Energy-saving lamps are dangerous to your health!

Scientists found that ultraviolet radiation of energy saving lamps can cause skin irritation if placed to the light source too close. According to medical experts, problems can arise if a long stay at a distance of less than 30 cm away from some of these lamps. The level of UV radiation produced by such sources of light, comparable to the influence of the sun on a clear day.

However, if the bulb itself is somewhat closed, this problem does not arise. The doctors add that these lights do not increase cancer risk. The reason for attention to technical innovation are complaints of people with sensitive skin to light. In reporting on the troubled light bulbs did not mention any specific manufacturer.

Factories and regulators to develop more stringent rules of production and use of such products. Experts say that the risk of using such lamps may be people who have problems with excessive sensitivity of the skin. For those who are healthy, they do not pose danger. To eliminate the possibility of problems, experts recommend using screens to absorb ultraviolet radiation.

Ultrasound window allowed scientists to peer into the brain

In order to help people suffering from many years of heavy flows of epilepsy, it is necessary to conduct a diagnostic study of the brain. But do it without surgery is not easy. A scientist from the University of Arizona, offers his own method.

In the case of such disease patients require surgery to remove a section of tissue. To do this, set the exact position of the region of the brain, the source of a convulsive seizure.

Electroencephalography is not a good helper, because it provides a low resolution image, and the introduction of the electrodes, allowing up much more accurate maps of the brain, is always a risk of infection (and sometimes there are strange hallucinations ).

The effect is as follows: the phase and magnitude of the voltage passing through the skin, proportional to the pressure of ultrasound directed at a particular body part.

In practice, this means focusing on a small section of skull ultrasonic beam changes its physical properties. The result is a kind of "electric box" that allows you to look inward, to accurately measure the weak electric field, which normally do not go beyond the human skull.

And so there they can be caught using standard equipment such as EEG (electrodes placed on the head as a hat). Further built more accurate maps can be used to determine exactly what area you want to delete.

Tuesday, August 16, 2011

Scientists argue that work in a busy office impairs mental performance


Scientists have found that working life in the modern bustling office can cause shrinkage of the brain. The situation is aggravated by the current leaders of fashion combined offices, where workers are sitting a few sections that are separated from each other only by small partitions or even entirely without them. So employees can practice without departing from the place to resolve many issues.

The negative consequences of such practices lies in the fact that in the brains of a busy office staff initiated an unnecessary activity that distracts him from work. Neuroscientists cite as an example even divert calls to a neighbor. Not to mention the endless conversations, which hears employee. According to the observations of scientists, this leads to a decrease in the brain.

Much better state of mind turned to those employees whose offices are many pictures and colors. Experts explain that this is due to external stimuli. With regard to the health and well-being, then those employees who can fill the office space your things, these figures grow to 15%.