Fig. 1From: Paradoxical spinopelvic motion: does global balance influence spinopelvic motion in total hip arthroplasty?The normal spinopelvic motion from standing (A) to sitting (B) position includes thoracic flexion (purple arrow), lumbar flexion (white arrows) and hip flexion (black arrow), which allows trunk anterior shift (orange arrow) and pelvic retroversion (yellow arrow). The pelvic retroversion provides acetabular anterior clearance during hip flexionBack to article page