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The shortage of physiologically appropriate independent control sources is probably the biggest impediment to the development and fitting of significantly more functional artificial limb replacements. The use of open-loop velocity control with visual feedback to control today's externally-powered artificial limb replacements further impedes the development of high performance multifunctional prostheses. Velocity control places an excessive mental burden on the user thereby limiting the number of degrees-of freedom that can be controlled in parallel. Both these issues and the implications they might have for the future control of multifunctional artificial limb replacements are explored.