The ability that humans have to perform very skilled movements such as writing is controlled by the:

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Quizplus · Accepted Answer

Corticospinal fibers mediate voluntary movement,particularly very skilled,discrete,purposeful movements,such as writing.The corticospinal tract (also known as the pyramidal tract)is a newer,"higher" motor system that humans have that permits very skilled and purposeful movements.The other responses are not related to skilled movements.

The Ability That Humans Have to Perform Very Skilled Movements