How does a decision in the prefrontal cortex become a movement of the hand? · Grey Matter

The frontal lobe works as a gradient from abstract at the front to concrete at the back.

How does a decision in the prefrontal cortex become a movement of the hand?

The frontal lobe works as a gradient from abstract at the front to concrete at the back. The prefrontal cortex holds the goal (pick up the cup), the premotor cortex and supplementary motor area choose and sequence the movements that serve it, and the primary motor cortex on the precentral gyrus issues the commands down the corticospinal tract to the spinal motor neurons. Along the way the basal ganglia release the chosen action and the cerebellum adjusts its force and timing, so the plan arrives at the muscles already corrected.