You know the feeling: You're walking down the street, when all of a sudden your shoe catches on a crack in the sidewalk. You realize that you've begun to fly forward, but for some reason, there's nothing you can do to keep yourself from falling.


And now, researchers have begun to understand why we lose our balance and end up flat on our faces.


The findings from the University of Michigan show that there's a lag between our brain registering that we're about to fall, and our muscles reacting to the fact that we're falling. Researchers were able to find this by analyzing electrical responses in the brain with an electroencephalogram (EEG).


"We're using an EEG in a way others don't, to look at what's going on inside the brain," study researcher Daniel Ferris, a professor in kinesiology at the university, said in a statement. "We were able to determine what parts of the brain first identify when you are losing your balance[1] during walking."


For the Journal of Neurophysiology study[2] , researchers hooked electrodes up onto 26 young, healthy people as they walked on a balance beam that was mounted to a treadmill. That way, when the study participants inevitably lost their balance walking on the balance beam, they would fall onto the treadmill and just start walking on that (thereby not falling and hurting themselves).


By examining the electrical responses in the brains of the study participants, researchers found that the brain recognizes a loss of balance before the fall actually occurs. Plus, people were more likely to first sense that they were about to fall when both of their feet were still on the ground.



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  • It Sharpens Thinking


    Earlier this year, Dartmouth researchers <a href="http://www.huffingtonpost.com/2012/05/31/exercise-makes-you-smarter-adhd-research_n_1528383.html">added support to mounting evidence about the way that exercise affects learning</a> and mental acuity: it boosts the production of “brain derived neurotrophic factor" -- or BDNF – a protein that is thought to help with mental acuity, learning and memory.




  • It May Alleviate Childhood ADHD Symptoms


    In the same Dartmouth study, the researchers discovered that, thanks to the BDNF boost, exercise also helped to <a href="http://www.wired.com/playbook/2012/05/exercise-memory-and-adhd/">alleviate ADHD-like symptoms in juvenile rats</a>. Since BDNF is involved in the brain's development and growth of new cells, the effect was more profound on the younger rats, with their still-developing brains and more rapid cell turnover, compared to adult rats.




  • It Helps You Learn New Tricks


    Even one exercise session can help you retain physical skills by enhancing what's commonly known as "muscle memory" or "motor memory," according to <a href="http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3433433/">new research published in <em>PlosOne</em>.</a> <a href="http://well.blogs.nytimes.com/2012/09/26/how-exercise-can-help-you-master-new-skills/">As the New York <em>Times</em> reported</a>, men who were taught to follow a complicated pattern on a computer and subsequently exercised were better able to remember the pattern in subsequent days than the men who didn't exercise after the initial squiggle test.




  • It Supports Problem-Solving


    In one study, mice that exercised by running not only generated new neurons, but those neurons lit up when the mice performed unfamiliar tasks like <a href="http://www.nytimes.com/2012/04/22/magazine/how-exercise-could-lead-to-a-better-brain.html?pagewanted=all">navigating a new environment</a>.




  • It Helps Alleviate Symptoms Of Depression


    When you exercise, your pituitary gland releases endorphins to help mitigate the physical stress and pain you are experiencing. But those endorphins may play a more important and longer-lasting role: they could help alleviate symptoms of depression, <a href="http://www.mayoclinic.com/health/depression-and-exercise/MH00043">according to a Mayo Clinic report</a>.




  • It Reduces Stress


    Although exercising raises our levels of cortisol -- the hormone that causes physical stress and is even associated with long-term memory impairment -- its overall effect is one of a stress reducer. That's because exercise increases the <a href="http://www.hormones.gr/57/article/article.html">body's threshold for cortisol</a>, making you more inured to stressors.




  • It Helps Delay Age-Associated Memory Loss


    As we get older, an area of the brain called the hippocampus shrinks. That's why age is associated with memory loss across the board. However, profound memory loss -- such as in dementia and Alzheimer's disease patients -- is also contributed to by accelerated hippocampus shrinking. Luckily, the hippocampus is also an area of the brain that generate new neurons throughout a lifespan. And, <a href="http://www.npr.org/2011/02/21/133777018/aerobic-exercise-may-improve-memory-in-seniors">the research shows</a>, exercise promotes new neural growth in this area.