UNASSIGNED: OBJECTIVE The objective of this study was to assess the cross-sectional areas (CSAs) of lumbar paraspinal muscles in adults with @entity19339 ( @entity19339 ), to compare them with those in the normative population, and to evaluate their correlations with demographic factors and MRI changes in various spinal elements. METHODS The authors conducted a retrospective study of @entity1 who had undergone posterior lumbar interbody fusion for @entity19339 , and 2 of the authors acting as independent observers calculated the CSAs of various lumbar paraspinal muscles (psoas, erector spinae [ES], multifidus [MF]) on preoperative axial T2-weighted MR images from the L-3 to L-5 vertebral levels and computed the CSAs as ratios with respect to the corresponding vertebral body areas. These values were then compared with those in an age- and sex-matched normative population and were analyzed with respect to age, sex, duration of symptoms, grade of listhesis, and various MRI changes at the level of the listhesis (pedicle signal change, @entity1797 , and facetal @entity2720 ). RESULTS Compared with values in normative controls, the mean CSA value for the ES muscle was significantly higher in the study cohort of 120 @entity1 (p = 0.002), whereas that for the MF muscle was significantly lower (p = 0.009), and more so in the @entity1 with @entity991 (p = 0.002). Magnetic resonance imaging signal change in the pedicle was seen in half of the @entity1 , all of whom demonstrated a Type 2 change. Of the variables tested in a multivariate analysis, age independently predicted lower area values for all 3 muscles (p  <= 0.001), whereas female sex predicted a lower mean psoas area value (p < 0.001). None of the other variables significantly predicted any of the muscle area values. A decrease in the mean MF muscle area value alone was associated with a significantly increased likelihood of a @entity991 (p = 0.039). CONCLUSIONS Compared with normative controls, @entity1 with @entity19339 suffer selective @entity194 of their MF muscle, whereas their ES muscle undergoes a compensatory @entity1184 . Advancing age has a detrimental effect on the areas of the lumbar PSMs, whereas female sex predisposes to a @entity121 . Multifidus @entity2057 correlates with @entity991 , indicating the role of this deep stabilizer in the biomechanical stability of spondylolisthetic spines. This may be of clinical significance in targeted physiotherapy programs during the conservative management of @entity19339 .

Lumbar paraspinal muscle morphometry and its correlations with demographic and radiological factors in adult XXXX : a retrospective review of 120 surgically managed cases.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity1797 :: ('MESH:D055959', 'Disease') :: ['disc degeneration'] @entity1184 :: ('MESH:D006984', 'Disease') :: ['hypertrophy'] @entity991 :: ('MESH:D015209', 'Disease') :: ['PSC'] @entity194 :: ('MESH:D001284', 'Disease') :: ['atrophy'] @entity2720 :: ('MESH:D007592', 'Disease') :: ['arthropathy'] @entity19339 :: ('MESH:D013168', 'Disease') :: ['IS', 'isthmic spondylolisthesis'] @entity2057 :: ('MESH:D009133', 'Disease') :: ['muscle atrophy'] @entity121 :: ('MESH:D009135', 'Disease') :: ['decreased psoas muscle area']
@entity19339 :: (MESH:D013168,Disease) :: ['isthmic spondylolisthesis']
