Abstract
Eighty-nine normal subjects were examined with lateral functional radiographs of standing, flexion and extension position using Putto' method. A specially designed radiopaque ruler was put on each film for calibration. Computer-assisted method was used for digitization and analysis. The mean values (standard deviation) of flexion-extension rotation in L1-L2, L2-L3, L3-L4, L4-L5 and L5-S1 were 6.9 (3.1), 13.9 (4.1), 12.6 (4.4), 14.4 (4.0), and 11.8 (6.0) degrees, respectively. The mean values (standard deviations) of flexion-extension translation in L1-2, L2-3, L3-4, L4-5 and L5-S1 were 1.3 (0.09), 1.5 (1.4), 2.2 (1.2), 2.0 (1.3) and 0.4 (0.17) respectively. From flexion to extension, the segmental rotation approached to zero degree and the intersegmental translation changed from retrolisthetic to neutral position although the changes were small. For the flexion-extension rotation, although the large variations may limit some clinical usefulness in the judgement of instability, the data still provided good diagnostic basis if the frequency was taken into consideration. For example, for translation changes, 2 mm was regarded as acceptable in most cases at the levels from L1 to L5 and in the level of L5-S1, the average translation change was only 0.4 mm.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the Annual Conference on Engineering in Medicine and Biology |
| Editors | Andrew Y.J. Szeto, Rangaraj M. Rangayyan |
| Publisher | Publ by IEEE |
| Pages | 1131-1132 |
| Number of pages | 2 |
| Edition | pt 3 |
| ISBN (Print) | 0780313771 |
| Publication status | Published - 1993 Dec 1 |
| Event | Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 3 (of 3) - San Diego, CA, USA Duration: 1993 Oct 28 → 1993 Oct 31 |
Publication series
| Name | Proceedings of the Annual Conference on Engineering in Medicine and Biology |
|---|---|
| Number | pt 3 |
| Volume | 15 |
| ISSN (Print) | 0589-1019 |
Other
| Other | Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 3 (of 3) |
|---|---|
| City | San Diego, CA, USA |
| Period | 93-10-28 → 93-10-31 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Signal Processing
- Biomedical Engineering
- Computer Vision and Pattern Recognition
- Health Informatics
Cite this
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Flexion-extension rhythm of lumbosacral spine. / Chang, Guan Liang; Su, Fong-chin; Tsai, Kuen Horng; Lin, Ruey Mo.
Proceedings of the Annual Conference on Engineering in Medicine and Biology. ed. / Andrew Y.J. Szeto; Rangaraj M. Rangayyan. pt 3. ed. Publ by IEEE, 1993. p. 1131-1132 (Proceedings of the Annual Conference on Engineering in Medicine and Biology; Vol. 15, No. pt 3).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Flexion-extension rhythm of lumbosacral spine
AU - Chang, Guan Liang
AU - Su, Fong-chin
AU - Tsai, Kuen Horng
AU - Lin, Ruey Mo
PY - 1993/12/1
Y1 - 1993/12/1
N2 - Eighty-nine normal subjects were examined with lateral functional radiographs of standing, flexion and extension position using Putto' method. A specially designed radiopaque ruler was put on each film for calibration. Computer-assisted method was used for digitization and analysis. The mean values (standard deviation) of flexion-extension rotation in L1-L2, L2-L3, L3-L4, L4-L5 and L5-S1 were 6.9 (3.1), 13.9 (4.1), 12.6 (4.4), 14.4 (4.0), and 11.8 (6.0) degrees, respectively. The mean values (standard deviations) of flexion-extension translation in L1-2, L2-3, L3-4, L4-5 and L5-S1 were 1.3 (0.09), 1.5 (1.4), 2.2 (1.2), 2.0 (1.3) and 0.4 (0.17) respectively. From flexion to extension, the segmental rotation approached to zero degree and the intersegmental translation changed from retrolisthetic to neutral position although the changes were small. For the flexion-extension rotation, although the large variations may limit some clinical usefulness in the judgement of instability, the data still provided good diagnostic basis if the frequency was taken into consideration. For example, for translation changes, 2 mm was regarded as acceptable in most cases at the levels from L1 to L5 and in the level of L5-S1, the average translation change was only 0.4 mm.
AB - Eighty-nine normal subjects were examined with lateral functional radiographs of standing, flexion and extension position using Putto' method. A specially designed radiopaque ruler was put on each film for calibration. Computer-assisted method was used for digitization and analysis. The mean values (standard deviation) of flexion-extension rotation in L1-L2, L2-L3, L3-L4, L4-L5 and L5-S1 were 6.9 (3.1), 13.9 (4.1), 12.6 (4.4), 14.4 (4.0), and 11.8 (6.0) degrees, respectively. The mean values (standard deviations) of flexion-extension translation in L1-2, L2-3, L3-4, L4-5 and L5-S1 were 1.3 (0.09), 1.5 (1.4), 2.2 (1.2), 2.0 (1.3) and 0.4 (0.17) respectively. From flexion to extension, the segmental rotation approached to zero degree and the intersegmental translation changed from retrolisthetic to neutral position although the changes were small. For the flexion-extension rotation, although the large variations may limit some clinical usefulness in the judgement of instability, the data still provided good diagnostic basis if the frequency was taken into consideration. For example, for translation changes, 2 mm was regarded as acceptable in most cases at the levels from L1 to L5 and in the level of L5-S1, the average translation change was only 0.4 mm.
UR - http://www.scopus.com/inward/record.url?scp=0027887048&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0027887048&partnerID=8YFLogxK
M3 - Conference contribution
SN - 0780313771
T3 - Proceedings of the Annual Conference on Engineering in Medicine and Biology
SP - 1131
EP - 1132
BT - Proceedings of the Annual Conference on Engineering in Medicine and Biology
A2 - Szeto, Andrew Y.J.
A2 - Rangayyan, Rangaraj M.
PB - Publ by IEEE
ER -