Fig. 1 | Scientific Reports

Fig. 1

From: Robotic trunk perturbation magnitude affects standing postural responses in individuals with motor complete spinal cord injury receiving epidural stimulation

Fig. 1

(A) Schematic of the Robotic Upright Stand Trainer (RobUST) delivering a right trunk perturbation. Perturbative forces are generated by mounted motors and delivered by cables attached to the trunk harness. Pelvis motors and cables apply constant force to assist pelvic control. Trunk kinematic and ground reaction forces are collected through motion capture cameras mounted on the frame and two force platforms, respectively (modified from Rejc et al.26). (B) Representative kinematic, electromyography (EMG) and kinetic responses from participant B45 to right trunk perturbations delivered at Low (7%Bodyweight, BW), Mid (11%BW) and High (15%BW) magnitude. Trunk displacement (Trunk) toward the right (R) side and R leg vertical ground reaction force (vGRF) change from baseline are larger with larger perturbation magnitudes (Pert). Vertical grey dotted lines depict perturbation onset. TA: tibialis anterior.

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