They are the machines of the body. Every finger movement, every eye blink, every cough, and even every toe wiggle is controlled by your muscles. And usually, it’s not just one muscle involved. It’s tens to hundreds of muscles for even the smallest movement.
Each flick of the finger fires off millions of neurons throughout the brain, spine, and central nervous system to contract and relax these muscle groupings. And all of this is just to scratch your nose.