![]() Up to 9–10 weeks, the lateral mesenchymal condensations became tongue-like folds i.e., the primitive form of the tentorium cerebelli, while the membranous Remained embedded in the lateral condensation. Not change: t he oculomotor nerve ran along the rostral aspect of the membranous meninx, the trigeminal nerve ran along the caudal side of the lateral mesenchymal condensation, and the trochlear nerve Notably, the topographical anatomy of the oculomotor, trochlear and trigeminal nerves did Subsequently, the plica ventralis evolved intoģ parts: bilateral lateral mesenchymal condensations and a primitive membranous meninx extendingīetween. In the loose tissues of the plica, the first meninx appeared as a narrow membrane along the oculomotor nerve at 7–8 weeks. We histologically examined paraffin-embedded sections from 18 human embryos andįetuses at 6–12 weeks of gestation. Kwang Ho Cho a,∗, Jose Francisco Rodríguez-Vázquez b, Eui Hyeog Han c, Samuel Verdugo-López b ,ĭepartment of Neurology, Wonkwang University School of Medicine, Institute of Wonkwang Medical Science, 344-2 Sinyong-dong, Iksan, Jeonbuk, Republic of Koreaĭepartment of Anatomy and Embryology II, Faculty of Medicine, Complutense University, E-28040 Madrid, Spainĭepartment of Anatomy, Chonbuk National University School of Medicine, 634-18 Geumam-dong, Deokjin-gu, Jeonju, Republic of Koreaĭivision of Internal Medicine, Iwamizawa Kojin-kai Hospital, 297-13 Iwamizawa, Japanĭepartment of Surgery, Chonbuk National University School of Medicine, 634-18 Geumam-dong, Deokjin-gu, Jeonju, Republic of Koreaĭevelopment of the meninges in and around the plica ventralis encephali has not been well documented.Ī distinct mesenchymal structure, the so-called plica ventralis encephali, is sandwiched by the fetal mesencephalic flexure. Particularly their topographical relation to cranial nerves Human primitive meninges in and around the mesencephalic flexure and Contents lists available at ScienceDirect ![]()
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