RT Journal Article
T1 Patients with Axial Spondyloarthritis Show an Altered Flexion/Relaxation Phenomenon
A1 Aranda-Valera, Concepción I.
A1 Garrido-Castro, Juan Luis
A1 Martínez-Galisteo, Alfonso
A1 Peña-Amaro, José
A1 González-Navas, Cristina
A1 Cuesta-Vargas, Antonio
A1 Jiménez-Reina, Luis
A1 Collantes-Estévez, Eduardo
A1 López-Medina, Clementina
K1 Axial spondyloarthritis
K1 Surface electromyography (sEMG)
K1 Flexion relaxation ratio
K1 Functional assessment
K1 Clinimetric properties
K1 Espondiloartritis axial
K1 Electromiografía
K1 Relajación
K1 Radio
K1 Estado funcional
AB Axial spondyloarthritis (axSpA) is a chronic rheumatic disease characterized by the presence of inflammatory back pain. In patients with chronic low back pain, the lumbar flexion relaxation phenomenon measured by surface electromyography (sEMG) differs from that in healthy individuals. However, sEMG activity in axSpA patients has not been studied. The purpose of this study was to analyze the flexion relaxation phenomenon in axSpA patients. A study evaluating 39 axSpA patients and 35 healthy controls was conducted. sEMG activity at the erector spinae muscles was measured during lumbar full flexion movements. sEMG activity was compared between axSpA patients and the controls, as well as between active (BASDAI ≥ 4) and non-active (BASDAI < 4) patients. The reliability (using intraclass correlation coefficients (ICC)), criterion validity and discriminant validity using the area Under the curve (AUC) for the inverse flexion/relaxation ratio (1/FRR) were evaluated. Significant differences (p < 0.05) were observed between axSpA patients and the control group in lumbar electric activity, especially during flexion, relaxation, and extension and in FRR and 1/FRR (0.66 ± 0.39 vs. 0.25 ± 0.19, respectively). In addition, significant differences were found between active and non-active but also between non-active and healthy subjects. The sEMG showed good reliability (ICC > 0.8 for 1/FRR) and criterion validity. ROC analysis showed good discriminant validity for axSpA patients (AUC = 0.835) vs. the control group using 1/FRR. An abnormal flexion/relaxation phenomenon exists in axSpA patients compared with controls. sEMG could be an additional objective tool in the evaluation of patient function and disease activity status.
PB MDPI
YR 2021
FD 2021-04-29
LK http://hdl.handle.net/10668/4105
UL http://hdl.handle.net/10668/4105
LA en
NO Aranda-Valera IC, Garrido-Castro JL, Martínez-Galisteo A, Peña-Amaro J, González-Navas C, Cuesta-Vargas A, et al. Patients with Axial Spondyloarthritis Show an Altered Flexion/Relaxation Phenomenon. Diagnostics. 2021 Apr 29;11(5):810
DS RISalud
RD Apr 7, 2025