Closed-loop EEG-based BMI-to-Rex system. Wireless EEG systems, sophisticated machine learning, system identification methods, and shared control approaches to minimize cognitive effort (and allow multitasking) will be deployed to calibrate the neural interface, control the powered exoskeleton and to reverse-engineer the neural representations for gait production. The BMI will coordinate among brain control (intent), manual control (when available), and the autonomous robot control algorithms. Decoding spaces for BMI control are shown.