Running to Increase Your Brain Fitness
An article in the Proceedings of the National Academy of Sciences highlights the potential effects of aerobic activity on the brain. The researchers found that running in increased memory and the creation of new nerve cells in mice.
The mice who ran performed much better on several tasks that required that they tell the difference between two visual patterns.The effect of running was very clear in adult mice. In mice who were very old, though, running didn’t make much difference, and they didn’t get much boost from the exercise.
John Grohol at PsychCentral also posted about the article, noting that some newspaper accounts barely mentioned the fact that the study was done with mice. He even points out that it was done with a specific variety of mice, and suggests that the relevance of the study may be limited. It’s true that it is very hard to know whether studies about mice really mean much for humans, since findings in animals often don’t generalize to humans.
As Grohol notes, the research is pretty clear that exercise can improve cognitive functioning in people as well as animals.But I’m not as concerned as he is that the results of this study will only apply to one strain of mice. Animal research has its problems when we apply it to human research, but in this case studies in humans have consistently shown similar results to those in animals. It may still be true that the reasons for changes in cognitive function in humans and animals may be different, but that means we would have to come up with two separate mechanisms for change. That’s actually making the situation more, rather than less, complex.
Dr Grohol makes an excellent point about human and animal research. Too often, we jump from preliminary findings to the real world. In areas in which animal and human studies generally agree,though, animals studies can extend and help find new directions for research at considerably less cost than similar studies in humans.
Reference:
Creer DJ et al. Running enhances spatial pattern separation in mice. Proceedings of the National Academy of Sciences, published online first January 19,2010 doi:10.1073/pnas.0911725107
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Mindfulness meditation as practiced over a long period by experts makes clear changes in someone’s brain function. But what about those of us who don’t have a few years to sit in a monastery in the Himalayas? A new study shows that even brief meditation practice can improve attention.
Researchers at Wake Forest University studied whether just four days of training (at just 20 minutes a day) could make a difference in participants’ mood, energy, and cognition. Undergraduate students (average age 22 years) either participated in the meditation sessions or spent a similar amount of time sitting quietly and listening to an audio book.
Participants in the meditation condition showed decreases in anxiety and improvements in several mental processing tasks compared to those in the audio book group. The meditators’ performance on one aspect of a working memory task (how many answers they got correct in a row) suggested that they may have improved their attention.
This is a small and very preliminary study that extends others’ work on meditation and the brain.It shows that even brief meditation practice can make a difference. you don’t have to be a Buddhist monk to learn to still your mind and pay better attention. Paying attention may be one of the most important things you can do to improve your brain’s functioning.
Reference:
Zeidan F et al.(in press) Mindfulness meditation improves cognition: Evidence of brief mental training. Consciousness and Cognition, doi:10.1016/j.concog.2010.03.014
I saw an interesting blog post yesterday evening on the site of the Huffington Post about the potential benefits of meditation – or at least about what one woman thinks might be the benefits. Priscilla Warner writes about the contrast between Tibetan monks’ apparent calm, evident even on brain scans, and her own anxiety disorder. Ms. Warner says that she suffers from panic disorder, a severe form of anxiety in which a person can have multiple anxiety attacks every day, even in the middle of the night. Her post is titled “I Want the Brain of a Monk” Although most people don’t suffer from anxiety this severe, many people have symptoms of anxiety. And research has consistently shown that higher levels of anxiety are related to more memory problems.
What’s the relation to brain fitness? In my brain fitness class, I often mention the usefulness of meditation in helping reduce stress and anxiety, both of which have negative effects on memory. You don’t have to go to Tibet to get the benefits of meditation. If you simply take 10 minutes several times a day to break in to the ongoing rush of getting things done, you’ve made a start. Use those 10 minutes to sit quietly, relax your muscles, and breathe deeply.
If you do that every day for two weeks, I think you’ll notice that you feel calmer and better able to focus. And if you’re better able to focus, you will be better able to pay attention and remember things.
Although many people are excited about the potential for using computers to train their brains, we shouldn’t forget that other techniques have been used to the train the brain for many centuries. I’m thinking about the large number of techniques for meditation. While free computer software still requires an investment in a computer, meditation only asks you to sit or lie quietly and focus your mind.
A recently-published study shows parts of the brain in long-term meditators are larger than the same parts of the brain in people who don’t meditate. The article by Eileen Luders and her colleagues appeared in a recent issue of the journal Neuroimage (Vol. 45, No. 3, pp. 672-678, April 15, 2009). The study showed that portions of the orbitofrontal cortex and the hippocampus were larger in persons who had been regular meditators for 5 or more years. The study is interesting because the parts of the brain that were larger are often thought to be important in helping people keep themselves emotionally balanced.
A number of strategies are likely to be helpful for meditators. There has been a great deal of interest over the last several years in mindfulness meditation. Researchers have studied how it can be used in reducing anxiety and depression. Mindfulness is based on Buddhist meditation (for a brief article, click here) but you don’t have to be a Buddhist to practice meditation. In fact, one of the most important persons who has promoted mindfulness is Jon Kabat-Zinn, a researcher at the University of Massachusetts. You can see a video presentation by him on YouTube by clicking here.
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