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If all of our movement are coordinated by motor symphonies, then what are muscles spasms, or involuntary twitches? Are they just mistakes by motor neurons or signals? And why do people's knees give out or buckle? Did their muscles just give up or get a signal to stop supporting your weight? It seems like the whole issue of walking and coordination of our bodies is a lot more difficult than I previously anticipated. After all there are many actions where our bodies make involuntary movements, or at least subconscious movements that we do not anticipate. Just because your knees buckled does not mean that you've damaged your motor cortex, right?