Exercise is good for your physical health. We have known this for a long time. We also know that physical activity is good for the brain and alleviates depression and stress. What’s more, training improves both memory and learning capacities. On the other hand, exaggerated exercise, when the body doesn’t have a chance to recover, has a negative effect, with fewer brain cells as a result. This is shown in a dissertation from the Sahlgrenska Academy at Göteborg University in Sweden. Moderation is best, in other words.
Biologist Andrew Naylor arrived at this by studying rats running in a treadmill. Rats that were allowed to run the treadmill for nine days acquired five times as many new stem cells in the part of the brain called the hippocampus compared with rats in a control group that did not run at all. Four weeks after their training, that is four weeks after the treadmill had been removed from the cage, about a third of the new cells were still there and had developed into functioning nerve cells.
The hippocampus is a part of the brain that is important for the regulation of stress reactions, but also for memory and learning. Andrew Naylor could confirm that these rats actually were better learners after their exercise by a running memory and learning test on them. The test had the rats swim in a round basin that had one place where they could get up out of the pool. The rats that had exercised learned more quickly than those who hadn’t where they should swim to get up out of the water.
Annika Söderpalm | alfa
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Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
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Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
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An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
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