A knowledge of the relationships between Plexus chorioideus, Fornix, and Thalamus is the basis of an understanding of the structural composition of the ventricular system. After Plexus chorioideus is removed, Taenia fornicis can be seen to arise at Fornix, and Taenia chorioidea at Thalamus. A thin residual part of Pallium, which is attached to Stria medullaris and secondarily welded to the surface of Thalamus, is designated Lamina affixa. Taenia chorioidea passes round the thalamus as far as the roof of Cornu inf. After removal of Plexus chorioid. a gaping hole (= Fiss. chorioidea) is left between Taenia fornicis and Taenia chor., which now connects the lateral ventricle with the extracerebral space: under the lateral ventricle Fissura transversa cerebri, and medial to Cornu inf. the Cisterna ambiens.


Lateral Ventricle Ventricular System Ventricle Wall Cisterna Ambiens Gaping Hole 
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Copyright information

© Springer-Verlag/Wien 1978

Authors and Affiliations

  • Wolfgang Seeger
    • 1
  1. 1.University of Freiburg i. Br.Federal Republic of Germany

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