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JOURNAL OF NEUROSURGICAL SCIENCES
Rivista di Neurochirurgia
Indexed/Abstracted in: e-psyche, EMBASE, PubMed/MEDLINE, Neuroscience Citation Index, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,651
Journal of Neurosurgical Sciences 2000 September;44(3):123-7
Non-hindbrain-related syringomyelia. Obstruction of the subarachnoid space and the central canal in rats. An experimental study
Cosan T. E. 1, Tel E. 1, Durmaz R. 1, Gulec S. 2, Baycu C. 3
1 Department of Neurosurgery, Osmangazi University, Eskisehir, Turkey;
2 Department of Anesthesiology, Osmangazi University, Eskisehir, Turkey;
3 Department of Histology and Embryology, Osmangazi University, Eskisehir, Turkey
Background. The aim is to determine the mechanism of non-hindbrain-related syringomyelia in experimental models. The effects of obstruction of central canal and subarachnoid space on occurrence of cavities were discussed.
Methods. 31 Sprague-Dawley rats were used with eight (Group D) as a control. In 10 rats (Group A) 1.5 µl kaolin was microinjected into the dorsal columns and central gray matter of the spinal cord at the level of Th6-10. In 10 rats (Group B) 0.1 cc kaolin was injected into the subarachnoid space at the same level. In 3 rats (Group C), 1.5 µl kaolin was administered into both dorsal midline of the spinal cord and the subarachnoid space.
Results. In Group A, histological examination revealed cystic cavity and dilatation of the central canal in five rats; denuded ependymal line and multicystic formations in ependymal and periependymal areas in seven rats. In Group B, denuded ependymal line in three rats and microcystic formations in ependymal and periependymal areas in four rats were revealed. In Group C, there were microcystic formations in two rats and syrinx cavity in one rat.
Conclusions. Developments leading to occurrence of cavities are focused on the central canal in all groups. These models indicate that the CSF-flow is from the subarachnoid space to the central canal leading to changes of cavities. In cases of obstruction of the subarachnoid space or the central canal, the occurrence of syrinx cavity initially is due to increased CSF (cerebrospinal fluid) pressure in the central canal. Flow changes in spinal cord is indicated by this study.