Korf H W, Fahrenkrug J
Cell Tissue Res. 1984;236(1):217-27. doi: 10.1007/BF00216534.
The lateral ventricles of the Pekin duck, Anas platyrhynchos, display characteristic ependymal and hypendymal specializations. Adjacent to the nucleus accumbens and the basal pole of the lateral septum the ventricular surface shows a highly folded pattern either with protrusions into the ventricular lumen or deep invaginations into the brain tissue. These medial and basal ependymal folds are found exclusively in a circumscribed region extending over a range of 600 micron in the rostrocaudal direction. Ependymal folds occurring in the lateral wall of the ventricles were traced up to the level of the interventricular foramen. Numerous capillaries are observed in the subependymal layer of these folds. By means of immunocytochemistry with antibodies against chicken vasoactive intestinal polypeptide (VIP) an aggregation of classical cerebrospinal fluid-contacting neurons is shown in the region of the nucleus accumbens and the lateral septum. These neurons are closely related to the ependymal folds. Additional VIP-immunoreactive neurons are scattered in deeper layers of the lateral septum and the nucleus accumbens. The latter are richly innervated by VIP-immunoreactive nerve fibers. The results of the present study are discussed with particular reference to the hypothesis of Kuenzel and van Tienhoven (1982) that ependymal specializations demonstrated in the lateral ventricles of the domestic fowl might represent a new circumventricular organ ("lateral septal organ").
北京鸭（Anas platyrhynchos）的侧脑室呈现出特征性的室管膜和室管膜下特化结构。在伏隔核和外侧隔的基极附近，脑室表面呈现出高度折叠的模式，要么向脑室腔内突出，要么向脑组织内深陷。这些内侧和基底室管膜褶皱仅在一个限定区域内发现，该区域在前后方向上延伸600微米。在脑室侧壁出现的室管膜褶皱一直追踪到室间孔水平。在这些褶皱的室管膜下层观察到大量毛细血管。通过使用抗鸡血管活性肠肽（VIP）抗体的免疫细胞化学方法，在伏隔核和外侧隔区域显示出一群典型的与脑脊液接触的神经元。这些神经元与室管膜褶皱密切相关。另外的VIP免疫反应性神经元散在于外侧隔和伏隔核的更深层。后者被VIP免疫反应性神经纤维丰富地支配。本研究结果特别参照了Kuenzel和van Tienhoven（1982）的假说进行了讨论，该假说认为在家禽侧脑室中显示的室管膜特化结构可能代表一种新的室周器官（“外侧隔器官”）。
