SHEFSTIM: A clinical trail of self-tuning array stimulation for foot-drop

Difficulty in locating the correct electrode site is the principle reason (after improvement in mobility) for discounty FES use [1]. Array stimulators have been proposed as a solution to this problem by several groups [2,3,4]. The principle of operation is that the electrode array is sufficiently large to guarantee coverage of the target neural tissue; one or more electrodes are energised while the response of the limb is monitored and the optimal electrodes are found through an appropriate search strategy.