AB1197 Changes in Lumbar Spinopelvic Pattern of Movement Influence the Flexion Relaxation of the Erector Spinae

摘要: Background In healthy subjects, the erector spinae muscles (ES) exhibits a relaxation of its electrical activity when trunk is nearby full flexion. Objectives To find out influence exhibiting lumbar spine or pelvis dominant pattern movement during flexion from upright position on appearance myoelectric spinae. Methods EMG right ES was recorded standardized position. Disposable surface electrodes Ag-AgCl were applied bilaterally to skin 3 cm lateral spinous process at L3 level. The signal full-wave rectified and averaged (40ms) produce linear envelope. An electrogoniometer measured differential - sagittal angular displacement in asymptomatic females. Both signals (EMG degrees) synchronously captured feed into same PC. Ranges spine, motion (lumbar + pelvis) calculated for entire movement. According subjects assigned respectively group1 (n=9) group2 (n=13) (mean ± SD age, 21.6±2.2 22.2±2.0 years, respectively). appearance. defined as that less than erect standing (basal EMG), then degrees trunk, pelvis, determined this point both groups further normalized maximum range One-way MANOVA determine differences referred ranges between groups. Results appeared significantly greater relative group 1 2 [group1: 90%±8% (43.9°±8.5°), group2: 83%±6 (59.3°±11.1°)]. There not significant (group1: 58%±12% (73.2°±22.9°), 58.5%±12.2% (69.6±17.2). appears degree 2. females exhibited with no until reached. Therefore, structures support moment without protection muscle activity. Conclusions influenced by variance spinopelvic References Response flexion-relaxation phenomenon load speed. Sarti MA, Lisόn JF, Monfort M, Fuster MA. Spine 26 2001; E421-E426. Acknowledgements This investigation has been supproted following grants: Ref. FIS2001-0070-01, TIC 2001-2786-C02-02, AP2001-376. Disclosure Interest None declared