Surprise, surprise! Your brain also thrives on physical exercise!

In recent studies at Northwestern University, scientists have been manipulating the levels of bone-morphogenetic protein or BMP in the brains of laboratory mice. In the brain, BMP has been found to diminish the rate of stem cell divisions. ..But exercise countermands some of the numbing effects of BMP. In work at this lab, mice given access to running wheels had about 50 percent less BMP-related brain activity within a week…helping to ensure that neuronal stem cells stay lively and new brain cells are born. For more…

http://well.blogs.nytimes.com/2010/07/07/your-brain-on-exercise/

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