To Investigate The Change Of Paravertebral Muscle Cross Sectional Area In Patients With Degenerative Lumbar Spondylolisthesisand Its Clinical Significance

Objective: To investigate the change of paravertebral muscle cross sectional area in patients with Degenerative Lumbar spondylolisthesis and analyze its clinical significance.Method: 102 patients(45males and 57 females) with mean age of 54.3±8.11 and with Lumbar spondylolisthesis were treated in our hospital from September 2013 to February2014. 102 healthy persons(47 males and 55 females) with mean age of 53.48±6.45 were reviewed as control. Both groups showed no age and gender related difference(p>0.05).The CSA of the bilateral paravertebal muscles, including multifidus muscle、psoas major and erector spinae, at the L3-L5 levels were measured using T2-weighted axial MRI and Image J2 x software. Using t test analyzed the difference of paravertebral muscle cross sectional area and the ratio of erector spinae CSA and multifidus muscle CSA between two groups. Result: DLS group comparing with control group showing that its extensor group CSA and the multifidus muscle CSA reduced in the aspect of L5,the right of psoas major CSA and left of extensor group CSA reduced in the aspect of L4. the psoas major CSA reduced 、the multifidus muscle CSA and extensor group CSA increased in the aspect of L3。The right multifidus muscle CSA reduced in the aspect of L3 and L4 for DLSS;The right erector spinae, CSA reduced in the aspect of L4 for DLSS. The right extensor group CSA reduced in the aspect of L4 for DLSS.The ratio of erector spinae CSA and multifidus muscle CSA of DLSS group reduced in the aspect of L3.Conclusion: The CSA of multifidus muscle、psoas muscle reduced in patients with DLS. And the erector spinae CSA change less than psoas muscle CSA. For the moment,more systematic research isneeded for the change of paravertebral muscle in DLS patients.