Figure 5. Single subjects responses to single vs repeated ramp-and-hold perturbations.

A, example of MG and SOL EMG, and PF torque following a single ramp-and-hold perturbation or preceded by one (B) or two (C) repeated triangular wave inputs. D, ankle PF torque responses overlaid following the final ramp-and-hold perturbations (subject 7). Longer-lasting joint torque and EMG responses were evident during the final hold phase with repeated stretch.