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  • Title: [Length of the spinal dural sac, sex differences and correlation with the length of the spinal cord and vertebral column in adults].
    Author: Nikolenko VN.
    Journal: Arkh Anat Gistol Embriol; 1985 Jun; 88(6):23-5. PubMed ID: 4051760.
    Abstract:
    In 94 corpses (59 male and 35 female) of mature persons the length of the spinal dura mater sac has been studied. The average length of the sac is 621 +/- 3 mm. In men its average length is 636 +/- 4 mm, it makes 40 mm more in length than that in women (596 +/- 4 mm). The length of various parts in the dura mater sac is not the same: the cervical part makes 23% of the whole length, the thoracic--47%, the lumbar--23%, the sacral--7%. In men the cervical part of the sac in average is 6 mm longer than the lumbar part, and in women--quite the reverse, it is 7 mm shorter than the lumbar part. The sacral part of the sac in women is 3 mm longer that that in men. The sex differences noted are statistically significant. It is stated that the length of the spinal cord, its dura mater and the vertebral column are related as 1:1.5:1.7, the length of their cervical parts--as 1:1.5:1.4. the thoracic--as 1:1.3:1.3, the lumbar--as 1:2.4:3, the sacrococcygeal--as 1:1.4:4.9, respectively. During ontogenesis the greatest increase in the dura mater sac takes place in the cervical part as compared to the spinal cord and the vertebral column; in the thoracic part the intensity of their growth is equal: in the lumbar and in the sacrococcygeal part the increase of the vertebral column is the greatest.
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