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Title: Effects of the trunk position on muscle stiffness that reflects elongation of the lumbar erector spinae and multifidus muscles: an ultrasonic shear wave elastography study.
Authors: Masaki, Mitsuhiro
Ji, Xiang
Yamauchi, Taishi
Tateuchi, Hiroshige  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-7429-8204 (unconfirmed)
Ichihashi, Noriaki  kyouindb  KAKEN_id
Author's alias: 建内, 宏重
市橋, 則明
Keywords: Paraspinal muscles
Muscle elongation
Muscle stiffness
Ultrasonography
Issue Date: May-2019
Publisher: Springer Nature
Journal title: European journal of applied physiology
Volume: 119
Issue: 5
Start page: 1085
End page: 1091
Abstract: PURPOSE: The present study aimed to clarify the effects of the trunk position on muscle stiffness that reflects elongation of the lumbar erector spinae and lumbar multifidus muscles using ultrasonic shear wave elastography (SWE). METHODS: The study included ten healthy men. The shear elastic modulus of the left lumbar erector spinae and lumbar multifidus muscles were evaluated using ultrasonic SWE. Measurement postures for the left lumbar erector spinae muscle were (1) prone position (Rest), (2) sitting position with the trunk flexed (Flexion), (3) the Flexion position adding right trunk lateral flexion (Flexion-Lateral Flexion), and (4) the Flexion position adding right trunk rotation (Flexion-Rotation 1). The left lumbar multifidus muscle were measured in positions (1)-(3), and (5) the Flexion position adding left trunk rotation (Flexion-Rotation 2). RESULTS: The shear elastic modulus of the lumbar erector spinae muscle in the Flexion-Lateral Flexion position was significantly higher than that in the Rest, Flexion, or Flexion-Rotation 1 positions. Shear elastic modulus of the lumbar multifidus muscle was similar in the Flexion, Flexion-Lateral Flexion, and Flexion-Rotation 2 positions, but significantly lower in the Rest position. CONCLUSIONS: The results of the present study suggest that the lumbar erector spinae muscle is stretched effectively in the position adding trunk contralateral lateral flexion to flexion. The results also indicate that the lumbar multifidus muscle, which does not appear to be affected by adding trunk contralateral lateral flexion or ipsilateral rotation to flexion, is stretched effectively in the trunk flexion position.
Rights: This is a post-peer-review, pre-copyedit version of an article published in European journal of applied physiology. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00421-019-04098-6.
The full-text file will be made open to the public on 12 February 2020 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/265259
DOI(Published Version): 10.1007/s00421-019-04098-6
PubMed ID: 30747266
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