PMID-8294972[0]Neuronal specification of direction and distance during reaching movements in the superior precentral premotor area and primary motor cortex of monkeys.
key thing: distance to target is represented in the motor & premotor corticies.
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[0] Fu QG, Suarez JI, Ebner TJ, Neuronal specification of direction and distance during reaching movements in the superior precentral premotor area and primary motor cortex of monkeys.J Neurophysiol 70:5, 2097-116 (1993 Nov)