The development of intervertebral disks during an early period of human ontogenesis
2009
Kryvetskyi V.V. | Kryvetskaja I.I
Deviations in forming and development of axial skeleton, even if they appear in the postnatal period of ontogenesis, but do not have clinical displays, may be considered as a basis of future pathology of spine of the adult. Their timely surgical removal or complex of conservative measures allow to correct the processes of development and growth, improve the health of grown-up population. Research purpose was to learn the development and becoming of intervertebral disks in the prenatal period of ontogenesis of man and their anatomic features at new-born.The terms of the enlarge of the intervertebral disks, the peculiarities of the development, differentiation of their cells, fibers and vessels have been elucidated by means of the microscopy methods of serial histological sections of 65 spine specimens on the site of the spine column of embryos, prefetuses and 45 fetuses and human neonates. Research conclusions: 1. At the end of early period of ontogenesis basic structural components of disk are determined. 2. There are dense fibred plates of fibrous ring in the external area of disk, in a middle area is a fibrous cartilage, and a gel kernel is formed in a center. The external s more differentiated dense fibred tissue and fibrous cartilage provide the dense attaching of disk to the bodies of vertebrae, and the less differentiated, but resilient tissue of gel kernel provides a spring function of disk.
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