Evaluation of Dual Channel vs. Single Channel FES for Dropfoot

Seventy (70) subjects put on the Ness L300 System, a FES device for ankle dorsiflexion for patients with foot drop. Stimulation will be given through two different electrodes: the QFE which is a single channel stimulation, and the Segmented Electrode which is a dual channel electrode. The purpose of the dual channel stimulation is to enable a balanced dorsiflexion, with no inversion/eversion inclinations. Ankle elevation will be recorded both in a seated position and during gait. Subject preference will be recorded through BSW Questionnaire and Subjective Survey. Twenty first subjects will be stimulated with four different dual channel configurations. The configuration that shows to have an advantage over the others will continue to be evaluated on fifty additional subjects. Same procedure will be taken place, in addition ambulation tests will be performed.