RT Journal Article T1 Lumbar multifidus thickness changes during active leg raising with ultrasound imaging can detect patients with chronic non-specific low back pain A1 Plaza Manzano, Gustavo A1 Fernández de las Peñas, César A1 Cleland, Joshua A. A1 Conde Lima, Rubén A1 Navarro-Santana, Marcos J. A1 Valera Calero, Juan Antonio A1 López De Uralde Villanueva, Ibai Julio AB BackgroundAltered lumbar multifidus (LM) activation has been found in populations with non-specific chronic low back pain (NSCLBP). Objective: To detect differences in LM muscle thickness at rest and during active manoeuvres between patients with NSCLBP and pain-free controls and to analyze the ability of LM thickness change during the active straight leg raise (ASLR) with rehabilitative ultrasound imaging to detect patients with NSCLBP.DesignCross-sectional observational study.MethodsSeventy volunteers (50% patients NSCLBP) were recruited. 18 B-mode images of LM at L4-L5 or L5-S1 level selecting the most symptomatic level (both sides, six at rest and three during ASLR) were collected by a blinded assessor. Differences between patients and controls in LM muscle thickness at rest, during ASLR (holding 3sec), and 5 s after ASLR were calculated. In addition, discriminant validity was evaluated by calculating the area under the receiver operating characteristic curve (ROC), sensitivity, specificity and positive and negative likelihood ratio.ResultsSignificant LM thickness change differences during ASLR were found within and between groups: bilaterally, LM thickness change during ASLR was significantly higher in healthy controls than in NSCLBP patients. Ipsilateral LM muscle thickness change was sensitive to detect individuals with NSCLBP (ROC = 0.79–0.80).ConclusionPain-free individuals exhibited significantly greater LM thickness changes bilaterally during the ASLR compared to patients with NSCLBP. LM thickness change during the ASLR has good validity for discriminating patients with NSCLBP. Further studies should assess benefits of LM training programs in the management of these patients. PB Elsevier SN 2468-8630 YR 2022 FD 2022-12 LK https://hdl.handle.net/20.500.14352/117957 UL https://hdl.handle.net/20.500.14352/117957 LA eng NO Gustavo Plaza-Manzano, César Fernández-de-las-Peñas, Joshua A. Cleland, Rubén Conde-Lima, Marcos J. Navarro-Santana, Juan Antonio Valera-Calero, Ibai López-de-Uralde-Villanueva. Lumbar multifidus thickness changes during active leg raising with ultrasound imaging can detect patients with chronic non-specific low back pain. Musculoskeletal Science and Practice. Volume 62; 102670. 2022. https://doi.org/10.1016/j.msksp.2022.102670. DS Docta Complutense RD 27 abr 2025