Research Article

Changes in Paraspinal Muscles and Facet Joints after Minimally Invasive Posterior Lumbar Interbody Fusion Using the Cortical Bone Trajectory Technique: A Prospective Study

Table 3

Preoperative and postoperative paraspinal muscle parameters.

Preoperative1-year follow-up

USES area (mm2)3168.14 ± 744.883215.08 ± 663.340.417
LSES area (mm2)2989.21 ± 871.462968.72 ± 795.050.711
SSES area (mm2)3495.66 ± 772.813463.48 ± 774.950.069
ESV (mm3)192480.767 ± 45962.31189865.65 ± 42912.180.384

USES, upper segment erector spinae muscle; LSES, lower segment erector spinae muscle; SSES, surgical segment erector spinae muscle; ESV, erector spinae muscle volume.