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KMID : 0438219720090020273
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Korea University Medical Journal
1972 Volume.9 No. 2 p.273 ~ p.298
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A Study of Motion and Height of the Lumbar Discs by Lumbar Dynamogram
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Abstract
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The purpose of this investigation was to measure the changes of motion of the lumbar discs in normal suiects and in patients with low-back pain. The motion of the lumbar discs were measured in extreme flexion and in extreme extension in Korean adults who were seen at the Department of Orthopedic Surgery, College of Medicine, Korea University.
The extent of flexion and extension motion was recorded in degree and that of compression of the discs in percentage. The cases were divided into two groups, "normal disc" and "disc of low-back pains". The study was carried out in 130 Korean male adults, which consisted of 50 normal subjects and 110 patients with low-back pain, whose age ranged from 15 to 50. The measurements were done by the method suggested by Begg and Falconer, and the roentgenograms (lumbar dynamogram) by Froning and Frohmen´s method, and the height of lumbar discs were measured by Kataoka´s method.
The results were as follows:
1 In the normal subjects, the range of disc was 11˚ at the first interlumbar space, 13˚ at the second, at the third, 15˚ at the fourth, and 14˚ at the fifth, making that of the entire lumbar spines as 67˚ The mobility was maximal at the fourth lumbar disc. The range of motion of the lumbar spire decreased as the age of the subjects increased, and this tendency was more marked in the subject older than 40.
2. In normal subjects, the height of the lumbar disc was maximal at the fourth lumbar space, followed by fifth, third, second, and first in that order. The height of the discs showed significant changes with increase of age of the subjects.
3. The range of motion of the lumbar spine decreased in the patients with low-back pain as well as in those with formation. The maximum mobility was 15˚ at the fourth lumbar space in patients with low-back pain and was 12˚ at the fifth lumbar space in those with spur formation.
4 The height of the lumber discs decreased in patient with low-back pain and those with spur formation. The finding may be related to pathologic changes of the discs.
5 Decreased range of motion of the lumbar spine as well as decreased height of the lumbar discs show significant correlation with clinical symptom of low back-pain.
6. Measurements of the range of motion and the height of the lumbar discs by lumbar dynamogram are reliable early diagnostic method of pathological changes of the lumbar discs.
7. Both in normal subjects and in patients with low-back pain, no sign, difference of mobility of the lumbar discs was observed in Koreans as compared with that of other races.
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KEYWORD
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