| Title |
Kinematics of the lumbar spine in trunk rotation: in vivo three-dimensional analysis using magnetic resonance imaging
|
|---|---|
| Published in |
European Spine Journal, June 2007
|
| DOI | 10.1007/s00586-007-0373-3 |
| Pubmed ID | |
| Authors |
Ryutaro Fujii, Hironobu Sakaura, Yoshihiro Mukai, Noboru Hosono, Takahiro Ishii, Motoki Iwasaki, Hideki Yoshikawa, Kazuomi Sugamoto |
| Abstract |
In vivo three-dimensional (3D) kinematics of the lumbar spine has not been well evaluated by the conventional methods because of their methodological limitations, while 3D intervertebral motions have been quantitatively determined by cadaver studies. We thus developed a novel 3D analyzing system for the relative motions of individual vertebrae using 3D magnetic resonance imaging (MRI) and analyzed in vivo 3D intervertebral motions of the lumbar spine during trunk rotation. Ten healthy volunteers underwent 3D MRI of the lumbar spine in nine positions with 15 degrees increments during trunk rotation (0 degrees , 15 degrees , 30 degrees , 45 degrees , and maximum). Relative motions of the lumbar spine were calculated by automatically superimposing a segmented 3D MRI of the vertebra in the neutral position over images of each position using the voxel-based registration method. These 3D motions were represented with 6 degrees of freedom by Euler angles and translations on the coordinate system. The mean axial rotation of ten healthy volunteers of each lumbar spinal segment in 45 degrees trunk rotation to each side ranged from 1.2 degrees to 1.7 degrees . Coupled flexion with axial rotation was observed at the segments from L1/2 to L5/S1. Coupled lateral bending of the segments from L1/2 to L4/5 was in the opposite direction of the trunk rotation, while that of T12/L1 and L5/S1 was in the same direction. The direction of the coupled lateral bending in the present study was different from that in the previous cadaver study only at L4/5. This difference might result from the non-load state of the supine position in the current study and/or the non-physiological state in the cadaver study. Our system has two limitations: (1) the study was conducted with each volunteer in the supine position, and (2) because the rotation device regulated trunk rotation, trunk rotation might not have been physiological. In vivo 3D intervertebral motions of the lumbar spine during trunk rotation were evaluated using our novel motion analysis system. These data may be useful for the optimal orthopaedic management of lumbar spinal disorders. |
X Demographics
The data shown below were collected from the profiles of 18 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Japan | 4 | 22% |
| Finland | 1 | 6% |
| Puerto Rico | 1 | 6% |
| Canada | 1 | 6% |
| United Kingdom | 1 | 6% |
| Unknown | 10 | 56% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 17 | 94% |
| Scientists | 1 | 6% |
Mendeley readers
The data shown below were compiled from readership statistics for 156 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 3 | 2% |
| Australia | 2 | 1% |
| Switzerland | 1 | <1% |
| Austria | 1 | <1% |
| Canada | 1 | <1% |
| United Kingdom | 1 | <1% |
| Unknown | 147 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 30 | 19% |
| Researcher | 28 | 18% |
| Student > Master | 20 | 13% |
| Professor > Associate Professor | 11 | 7% |
| Professor | 10 | 6% |
| Other | 35 | 22% |
| Unknown | 22 | 14% |
| Readers by discipline | Count | As % |
|---|---|---|
| Engineering | 41 | 26% |
| Medicine and Dentistry | 39 | 25% |
| Computer Science | 7 | 4% |
| Nursing and Health Professions | 7 | 4% |
| Sports and Recreations | 7 | 4% |
| Other | 18 | 12% |
| Unknown | 37 | 24% |
Attention Score in Context
This research output has an Altmetric Attention Score of 13. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 26 February 2024.
All research outputs
#2,778,819
of 25,537,395 outputs
Outputs from European Spine Journal
#256
of 5,301 outputs
Outputs of similar age
#6,480
of 82,716 outputs
Outputs of similar age from European Spine Journal
#5
of 17 outputs
Altmetric has tracked 25,537,395 research outputs across all sources so far. Compared to these this one has done well and is in the 89th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 5,301 research outputs from this source. They receive a mean Attention Score of 4.2. This one has done particularly well, scoring higher than 95% of its peers.
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We're also able to compare this research output to 17 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 76% of its contemporaries.