Measuring cortical motor hemodynamics during assisted stepping: An fNIRS feasibility study of using a walker - Lima-Pardini, Andrea Cristina de; Morais, Guilherme Augusto Zimeo; Balardin, Joana Bisol; Coelho, Daniel Boari; Azzi, Nametala Maia; Teixeira, Luis Augusto; Sato, João Ricardo (Gait & posture, 2017)