In our work with deafferentation (C2-T12) we found that monkey were quite competent in developing exquisite digital coordination in order to learn coordinated and counterbalanced digital collaboration. But leaving a small rootlet intact caused severe discoordination of such movements. But if a rootlet is left intact, that input greatly discoordinates digital movements well learned. Similarly, dorsal column lesion, DC nuclei lesion but not Cuneo-cerebellar tract lesion alone caused "permanent" (9 months of daily testing) loss of digital coordination seen in monkeys post-op. Superimposed dorsal rhizotomy (deafferentation) resulted in recovery of digital coordination that seemed umrecoverable. This raises an old question: does residual sensory input as REAFFERENCE become NOISE that the monkey can neither exploit nor control. Thus, ascending disordered input may well impede motor programs.