Evaluation of the Safety and Performance of the NESS L300 Plus System

Inclusion Criteria: * Upper motor neuron lesion * Thigh muscle weakness - hamstrings or quadriceps strength of less than 4/5 according to manual muscle testing * Foot drop - toe drag during walking * Lower limb spasticity - 0-4 according to the modified Ashworth scale * Responsible mental state, able to follow multiple step directions * Between 18 and 80 years old * Available for participation in the study * Able to understand and sign the informed consent form * Able to walk independently or with an assistance device (e.g. cane, walker etc.) / spot guarding for at least 10 meters * Sufficient response to electrical stimulation (visible muscle contractions in a seated or prone position of each designated muscle separately) Exclusion Criteria: * Subjects with a demand-type cardiac pacemaker, defibrillator or any electrical or metallic implant * Cancerous lesion of lower limb, present or suspected * Medical condition that prevents participation or would likely lead to inability to comply with the protocol \[e.g.: congestive heart failure, patient receiving chemotherapy, uncontrolled epilepsy, etc\] * Severe cognitive impairment (MMSE\<21) * Severe neglect (Star cancellation test\<30) * Skin lesion at the site of the stimulation electrodes * Change in bone-joint structures of the lower limb, such as contractures or deformations; fracture or dislocation, which would be adversely affected by motion from the stimulation * Pregnancy * Diagnosis of major depression or psychotic disorder * Participation in another investigation that may directly or indirectly affect the study results * Unable to tolerate electrical stimulation