A Functional Subdivision of Hip, Abdominal, and Back Muscles During Asymmetric Lifting
- 1 March 2001
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Spine
- Vol. 26 (6), E114-E121
- https://doi.org/10.1097/00007632-200103150-00003
Abstract
An experimental study of muscle recruitment patterns during asymmetric lifting in healthy individuals. To investigate muscle recruitment patterns during asymmetric lifting, representing a common daily living activity, to determine whether systematic differences exist between functioning of the local and global muscle systems. The normal function of the local muscle system is to provide sufficient segmental stability to the spine. The global muscle system provides general trunk stabilization and enables the static and dynamic work necessary for daily living and sports activities. Current knowledge about these two muscle groups appears to be specifically derived from anatomic findings and experiments conducted under artificial circumstances. To the authors’ knowledge, the recruitment patterns of both muscle groups have not been investigated in daily living activities. Twenty-nine healthy individuals performed different variants of asymmetric lifting activities. Electromyographic data were collected from seven hip, abdominal, and back muscle pairs. In addition, trunk kinematics were measured by means of an ultrasonic movement analysis system. The left and right obliquus internus, rectus femoris, and multifidus showed symmetric co-contraction in all variants of activities. In contrast, significant left/right differences were observed in the external oblique, gluteus maximus, iliocostalis lumborum pars thoracis, and latissimus dorsi. The results of this study show a symmetric activation of the local muscles during the performance of low-load, asymmetric lifting tasks, which suggests that these muscles play a stabilizing role during these manoeuvres. The global muscles, however, hand show asymmetric patterns of activation during the same tasks, supporting their role as global stabilizers and prime movers.Keywords
This publication has 41 references indexed in Scilit:
- CT imaging of trunk muscles in chronic low back pain patients and healthy control subjectsEuropean Spine Journal, 2000
- Trunk kinematics of one-handed lifting, and the effects of asymmetry and load weightErgonomics, 1996
- Mechanical stability of the in vivo lumbar spine: implications for injury and chronic low back painClinical Biomechanics, 1996
- Changes in intra-abdominal pressure, trunk muscle activation and force during isokinetic lifting and loweringEuropean Journal of Applied Physiology, 1994
- Observations on intra‐abdominal pressure and patterns of abdominal intra‐muscular activity in manActa Physiologica Scandinavica, 1992
- Review of the functional anatomy of the spinal ligaments and the lumbar erector spinae musclesClinical Anatomy, 1992
- Power Spectrum Analyses of Electromyographic ActivitySpine, 1991
- The Spine as an Arch A New Mathematical ModelSpine, 1989
- Stability of the lumbar spineActa Orthopaedica, 1989
- Electromyography of deep back muscles in manJournal of Anatomy, 1972