RecruitingBehavioural interventionOperant Conditioning of Spinal Reflexes Training System--Reflex Operant Down ConditioningThe purpose of this study is to validate the capacity of a reflex training system to change the size of the targeted reflex. For this, the researchers are recruiting 25 individuals with chronic incomplete SCI who have spasticity in the leg to participate in the reflex training procedure. The study involves approximately 45 visits with a total study duration of about 6 months.