When your brain talks, your muscles don't always listen

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Christopher Knight (left) a scientist at the University of Delaware and graduate student Dhiraj Poojari are examining the nerves and muscles of the index finger to shed light on how our motor-control system which rules movement changes as we age. Cre ...
Christopher Knight (left), a scientist at the University of Delaware, and graduate student Dhiraj Poojari are examining the nerves and muscles of the index finger to shed light on how our motor-control system, which rules movement, changes as we age. Credit: Kathy F. Atkinson, University of Delaware

Have your neurons been shouting at your muscles again? It happens, you know. As we grow older, neurons--the nerve cells that deliver commands from our brains--have to "speak" more loudly to get the attention of our muscles to move, according to University of Delaware researcher Christopher Knight, an assistant professor in UD's College of Health Sciences.


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