Sharing the road

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Constant crosstalk between motor (shown in green) and sensory (shown in red) nerves ensures that the two different types of neurons join up after they emerge from the spinal cord but sort into separate fascicles containing either sensory or motor axo ...
Constant crosstalk between motor (shown in green) and sensory (shown in red) nerves ensures that the two different types of neurons join up after they emerge from the spinal cord but sort into separate fascicles containing either sensory or motor axons, but never both. Courtesy of Benjamin W. Gallarda and Shane E. Andrews, Salk Institute for Biological Studies

Come summer, we will once again marvel at the amazing athletic skills of Olympic athletes while in fact, the simple act of walking is no less remarkable. Just to prevent us from toppling over, the neuromuscular circuitry that controls all bodily movements relies on constant sensory feedback from the periphery to fine-tune its commands to hundreds of muscles.


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