Vol. 45, No. 2, 2001
THE ADHESION AND FUSION OF THE EPENDYMA AND PLEXUS CHORIOIDEUS IN THE CEREBRAL VENTRICLES IN SHEEP AND GOAT
Rajtová, V.
University of Veterinary Medicine
Komenského 73
041 81 Košice
The Slovak Republic
Summary
Certain changes in the ependymal lining of the third and lateral cerebral ventricles in sheep and goats were observed. From day 56 the adhesion of opposing walls of the third cerebral ventricle in the foetuses of both small ruminants is formed under the adhesio interthalamica (AIT) and in the rostral part of the lateral ventricle. From about day 135 of the development, a release from adhesion under the AIT occurs. In the postnatal period, in almost every individual coarctation in the region of the lateral ventricle was recorded: in the cornu rostrale and in the lower part of the cornu temporale. Only in two sheep in the third ventricle under the AIT, were there some traces in the form of "small islands" as adhesion remnants. In the postnatal material, the coarctations were also found in sporadic cases between the ependyma and the appropriate plexus chorioideus.
Key words: CNS; third and lateral cerebral ventricles; ependyma; plexus chorioideus; adhesion; coarctation; sheep; goat
References
Folia Veterinaria / 2001