Fig. 2From: How does the sagittal spinal balance of the scoliotic population deviate from the asymptomatic population?Measurements of sagittal spinopelvic parameters. TK, thoracic kyphosis; LL, lumbar lordosis; PI, pelvic incidence; PT, pelvic tilt; SS, sacral slope; SSA, spinosacral angle; ST, spinal tilt. HA refers to hip axisBack to article page