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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(4):809-814.
Correlation of Ultrasonographic Measure of Lumbar Multifidus Muscles with Isometric Torque of Low Back.
Han, Tai Ryoon , Kim, Jin Ho , Chung, Sun Gun , Kwon, Bum Sun , Lee, Kyeong Woo
1Department of Rehabilitation Medicine, Seoul National University College of Medicine.
2Department of Rehabilitation Medicine, Dan-guk University College of Medicine.
초음파로 측정한 요천추부 다열근의 크기와 배부 근력간의 관련
한태륜, 김진호, 정선근, 권범선1, 이경우
서울대학교 의과대학 재활의학교실, 1단국대학교 의과대학 재활의학교실
Abstract

Objective
To measure lumbar multifidus muscles by ultrasonography and to study its correlation with the isometric peak touque of back.


Method
Bilateral L5 and S1 multifidus muscle sizes of 18 healthy volunteers were measured in prone position by ultrasonography with 7.5 MHz, 40 mm-length probe. Multifidus muscles were identified using anatomic landmark-spinous process and lamina and vertical and horizontal diameter were measured. Boundary of muscle was traced and cross sectional area was measured.

Lumbar spinal range of motion (ROM) and isometric peak torque of three axes-flexion/ extension, rotation and lateral flexion-were measured by Isostation B-200R back muscle tester.


Results
Multifidus muscle cross sectional areas were well correlated with isometric peak torque in all direction of movements. Muscle size and lumbar spine ROM showed no correlation.


Conclusion
Ultrasonographic measure of lumbar multifidus muscles could be a useful tool to estimate back muscle function.

Key Words: Multifidus, Ultrasonography, Back muscle, Multifidus


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