Muscles control all movement. Every finger movement to eye blink to cough to toe wiggle to getting up from a chair to getting out of a car to, well, you name the movement, is controlled by muscle.
And usually tens to hundreds of muscles to control even the smallest of movements.
Every movement consists of thousands to millions of neurons firing all throughout the brain and the spine and the central nervous system to the peripheral nervous system, controlling hundreds of muscles that are contracting and relaxing to allow the movement, akin to a symphony of firings throughout the nervous system.
All of this just to control scratching your nose. Continue reading Exercise, Trigger Points, and Muscle Pain