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KMID : 0377619770330010073
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Korean Jungang Medical Journal
1977 Volume.33 No. 1 p.73 ~ p.77
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The Significance of the Sagittal Diameter of the Cervical Spinal Canal in Relation to Spondylosis and Myelopathy
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김형근/Kim, Hyeung Keun
김남규/Kim, Nan Ky
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Abstract
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It is well known that subjects with all the radiological features of cervical spondylosis may be symptom-free.
On the other hand, manifest cervical myelopathy may occur in the presence of modest radiological changes.
This discrepancy between symptoms and radiological findings seems to be attributable mainly to differences in the initial size of the cervical spinal canal
In order to determine the minimal diameter of the cervical spinal canal, the canal, diameter was measured in radiographs taken in the neutral portion in 361 cases (male; 198, female; 163) and patients were classified into four groups as following.
1) Control group (male; 62, female; 56) : There were no cervical myelopathy and cervical spondylosis.
2) Group II (male; 60, female; 49): Significant cervical myelopathy without cervical spondylosis.
3) Group III (male; 31, female; 27): Cervical spondylos with cervical myelopathy 4) Group IV (male; 45, female; 31) : Cervical spondylosis without cervical myelopathy.
It was found that;
1) In the myelopathic group the average canal diameter was, significantly smaller than in the control group.
2) In cervical spondylosis without cervical myelopathy the initial sagittal diameter of the cervical spinal canal was larger than control group and
more than 17mm.
3) In the cases of cervical myelopathy without cervical spondylosis, the sagittal diameter of the cervical spinal canal) was smaller than 13.5mm usually.
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