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Title: Association of sagittal spinal alignment with thickness and echo intensity of lumbar back muscles in middle-aged and elderly women
Authors: Masaki, Mitsuhiro
Ikezoe, Tome  kyouindb  KAKEN_id  orcid (unconfirmed)
Fukumoto, Yoshihiro
Minami, Seigo
Tsukagoshi, Rui
Sakuma, Kaoru
Ibuki, Satoko
Yamada, Yosuke
Kimura, Misaka
Ichihashi, Noriaki  kyouindb  KAKEN_id
Author's alias: 正木, 光裕
池添, 冬芽
佐久間, 香
市橋, 則明
Keywords: Aged
Paraspinal muscles
Issue Date: Sep-2015
Publisher: Elsevier Ireland Ltd
Journal title: Archives of Gerontology and Geriatrics
Volume: 61
Issue: 2
Start page: 197
End page: 201
Abstract: Objective: Quantitative changes, such as a decrease in muscle mass, and qualitative changes, such as an increase in the amount of intramuscular non-contractile tissue, occur with aging. However, it is unclear whether quantitative or qualitative changes in back muscles are associated with spinal alignment in the standing position. We investigated the association of sagittal spinal alignment with muscle thickness as an index of the mass of lumbar back muscles and muscle echo intensity as an index of the amount of non-contractile tissue within these muscles. Methods: Study participants comprised 36 middle-aged and elderly women. Thickness and echo intensity of erector spinae, psoas major, and lumbar multifidus muscles were measured using an ultrasound imaging device. Standing sagittal spinal alignment, determined from thoracic kyphosis and lumbar lordosis angles, and the sacral anterior inclination angle was measured using the Spinal Mouse. Results: Stepwise regression analysis performed using muscle thickness, echo intensity, and age as independent variables showed that erector spinae muscle thickness was a significant determinant of the thoracic kyphosis angle. Psoas major muscle thickness and echo intensity of the lumbar multifidus muscle were significant determinants of the sacral anterior inclination angle. Conclusion: Our results suggest that an increase in thoracic kyphosis is associated with a decrease in the mass of the erector spinae muscle, and that a decrease in pelvic anterior inclination is associated with a decrease in the mass of the psoas major muscle and an increase in the amount of non-contractile tissue within the lumbar multifidus muscle.
Rights: © 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license The full-text file will be made open to the public on 01 September 2016 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。
DOI(Published Version): 10.1016/j.archger.2015.05.010
PubMed ID: 26058723
Appears in Collections:Journal Articles

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