Improved understanding of how our brains control our arms may lead to design of better brain controlled prosthetic limbs

Ready, set, go.Sometimes that's how our brains work. When we anticipate a physical act, such as reaching for the keys we noticed on the table, the neurons that control the task adopt a state of readiness, like sprinters bent into a crouch.Other times, however, our neurons must simply react, such as if someone were to toss us the keys without gesturing first, to prepare us to catch.How do the neurons in the brain control planned versus unplanned arm movements?