cortical motor area ·Function: modulate the coordination of ventrolateral nucleus of thalamus voluntary and fineness red nucleus (parvocellular part) movement, to inferior olivary nucleus corticopontine tract including cerebrocerebellum determination of dentate nucleus movement pontine nucleus strength,direction lateral corticospinal and amplitude. motor neuron of spinal anterior horn • Function: modulate the coordination of voluntary and fineness movement, including determination of movement strength, direction and amplitude