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Fig. 1d. Microcephalic Craniorhachischisis

In this condition the spinal arches are separated by a wide cleft which usually extends to tlie lumbar region. The imperfectly developed brain in most of the cases is dislocated downward in the cervical region (hernia cerebri cervicalis) arid in a few instances this hernial formation is found in the thoracic region. The covering of the hernial sac is a meningeal-like membrane continuous with the covering of the flattened internal base of the cranium and that of the open vertebral arches. This type forms the largest number in our series of acrania, there being nineteen cases, or 83.3 per cent of the whole number of anencephalic cases.


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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)
Links: Fig 1. Anencephalus types | Fig 1a. anencephalic acranius | Fig 1b. anencephalic craniorhachischisis | Fig 1c. microcephalic acrauius | Fig 1d. microcephalic craniorhachischisis | Fig 1e. exocephalic acranius | Fig 16. anencephalic and normal fetuses | Historic Embryology Papers | Neural Abnormalities | Folic Acid and Neural Tube Defects | Skull Development


Reference

Nañagas JC. A comparison of the growth of the body dimensions of anencephalic human fetuses with normal fetal growth as determined by graphic analysis and empirical formulae. (1925) American J. Anatomy. 455-494.



Cite this page: Hill, M.A. (2024, March 4) Embryology Nanagas1925-fig01d.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Nanagas1925-fig01d.jpg

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