Flexion-extension rhythm in the lumbosacral spine

Ruey Mo Lin, Chih Yin Yu, Zeu Jen Chang, Fong-chin Su

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Study Design and Objectives. This study was conducted to depict the qualitative and quantitative changes of intervertebral rotation and translation from L1-L2 to L5-51 during flexion, standing, and extension using dynamic lumbosacral radiographs. Methods, A radiopaque ruler was placed on the back of each subject for the normalization of translational value. Eighty-nine- volunteers were examined, Results. From extension to flexion, all of the intervertebral rotations approached 0˚ from the lordotic position; the translations changed from slightly retrolisthetic to zero displacement. Using L3-L4 as a baseline for calculating the intervertebral differences in flexion, air of the rotational differences were less than 1.5˚ except at L5-S1, which remained 5. The mean translational differences was less than 0.5 mm, except at L5-S1, where it remained 1.5 mm. Conclusion. The amount of total flexibility was level-dependent and its frequency distribution is important. Qualitative values changes front extension to flexion and quantitative values of intervertebral differences in flexion help define the normal flexibility more accurately.

Original languageEnglish
Pages (from-to)2204-2209
Number of pages6
JournalSpine
Volume19
Issue number19
DOIs
Publication statusPublished - 1994 Jan 1

Fingerprint

Spine
Volunteers
Air

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine
  • Clinical Neurology

Cite this

Lin, Ruey Mo ; Yu, Chih Yin ; Chang, Zeu Jen ; Su, Fong-chin. / Flexion-extension rhythm in the lumbosacral spine. In: Spine. 1994 ; Vol. 19, No. 19. pp. 2204-2209.
@article{6d4e90d60cd9494db933ca6c34199a2a,
title = "Flexion-extension rhythm in the lumbosacral spine",
abstract = "Study Design and Objectives. This study was conducted to depict the qualitative and quantitative changes of intervertebral rotation and translation from L1-L2 to L5-51 during flexion, standing, and extension using dynamic lumbosacral radiographs. Methods, A radiopaque ruler was placed on the back of each subject for the normalization of translational value. Eighty-nine- volunteers were examined, Results. From extension to flexion, all of the intervertebral rotations approached 0˚ from the lordotic position; the translations changed from slightly retrolisthetic to zero displacement. Using L3-L4 as a baseline for calculating the intervertebral differences in flexion, air of the rotational differences were less than 1.5˚ except at L5-S1, which remained 5. The mean translational differences was less than 0.5 mm, except at L5-S1, where it remained 1.5 mm. Conclusion. The amount of total flexibility was level-dependent and its frequency distribution is important. Qualitative values changes front extension to flexion and quantitative values of intervertebral differences in flexion help define the normal flexibility more accurately.",
author = "Lin, {Ruey Mo} and Yu, {Chih Yin} and Chang, {Zeu Jen} and Fong-chin Su",
year = "1994",
month = "1",
day = "1",
doi = "10.1097/00007632-199410000-00015",
language = "English",
volume = "19",
pages = "2204--2209",
journal = "Spine",
issn = "0362-2436",
publisher = "Lippincott Williams and Wilkins",
number = "19",

}

Flexion-extension rhythm in the lumbosacral spine. / Lin, Ruey Mo; Yu, Chih Yin; Chang, Zeu Jen; Su, Fong-chin.

In: Spine, Vol. 19, No. 19, 01.01.1994, p. 2204-2209.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Flexion-extension rhythm in the lumbosacral spine

AU - Lin, Ruey Mo

AU - Yu, Chih Yin

AU - Chang, Zeu Jen

AU - Su, Fong-chin

PY - 1994/1/1

Y1 - 1994/1/1

N2 - Study Design and Objectives. This study was conducted to depict the qualitative and quantitative changes of intervertebral rotation and translation from L1-L2 to L5-51 during flexion, standing, and extension using dynamic lumbosacral radiographs. Methods, A radiopaque ruler was placed on the back of each subject for the normalization of translational value. Eighty-nine- volunteers were examined, Results. From extension to flexion, all of the intervertebral rotations approached 0˚ from the lordotic position; the translations changed from slightly retrolisthetic to zero displacement. Using L3-L4 as a baseline for calculating the intervertebral differences in flexion, air of the rotational differences were less than 1.5˚ except at L5-S1, which remained 5. The mean translational differences was less than 0.5 mm, except at L5-S1, where it remained 1.5 mm. Conclusion. The amount of total flexibility was level-dependent and its frequency distribution is important. Qualitative values changes front extension to flexion and quantitative values of intervertebral differences in flexion help define the normal flexibility more accurately.

AB - Study Design and Objectives. This study was conducted to depict the qualitative and quantitative changes of intervertebral rotation and translation from L1-L2 to L5-51 during flexion, standing, and extension using dynamic lumbosacral radiographs. Methods, A radiopaque ruler was placed on the back of each subject for the normalization of translational value. Eighty-nine- volunteers were examined, Results. From extension to flexion, all of the intervertebral rotations approached 0˚ from the lordotic position; the translations changed from slightly retrolisthetic to zero displacement. Using L3-L4 as a baseline for calculating the intervertebral differences in flexion, air of the rotational differences were less than 1.5˚ except at L5-S1, which remained 5. The mean translational differences was less than 0.5 mm, except at L5-S1, where it remained 1.5 mm. Conclusion. The amount of total flexibility was level-dependent and its frequency distribution is important. Qualitative values changes front extension to flexion and quantitative values of intervertebral differences in flexion help define the normal flexibility more accurately.

UR - http://www.scopus.com/inward/record.url?scp=0027935732&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027935732&partnerID=8YFLogxK

U2 - 10.1097/00007632-199410000-00015

DO - 10.1097/00007632-199410000-00015

M3 - Article

VL - 19

SP - 2204

EP - 2209

JO - Spine

JF - Spine

SN - 0362-2436

IS - 19

ER -