Fig. 2From: In vivo dynamic motion characteristics of the lower lumbar spine: L4–5 lumbar degenerative disc diseases undergoing unilateral or bilateral pedicle screw fixation combined with TLIFa Subject performing 7 functional postures of the torso (upright standing, maximum extension, flexion, left–right twist and left–right bend) in the capture of the dual fluoroscopic imaging system. b In the solid modeling software (Rhinoceros 5.0), the in vivo vertebral positions were reproducedBack to article page