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ABSTRACT THERE is in birds a thin vertical plate of bone between the eyes known as the interorbital septum. In the chick embryo this originates from the fusion of two pairs of cartilaginous
primordia (the orbital cartilages above and the trabeculæ cranii below) with each other and with a median cartilaginous bar, the intertrabecula. At around seven to eight days of incubation,
these structures lose their identities and merge into one another to form the high thin septum of the fully formed chondrocranium. At about the same time the lateral unfused parts of the
anterior orbital cartilages regress and disappear almost completely. Access through your institution Buy or subscribe This is a preview of subscription content, access via your institution
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about institutional subscriptions * Read our FAQs * Contact customer support SIMILAR CONTENT BEING VIEWED BY OTHERS SONIC HEDGEHOG AND FIBROBLAST GROWTH FACTOR 8 REGULATE THE EVOLUTION OF
AMNIOTE FACIAL PROPORTIONS Article Open access 18 January 2025 CELLULAR TRANSITIONS DURING CRANIAL SUTURE ESTABLISHMENT IN ZEBRAFISH Article Open access 13 August 2024 3D ATLAS OF THE HUMAN
FETAL CHONDROCRANIUM IN THE MIDDLE TRIMESTER Article Open access 13 June 2024 REFERENCES * de Beer, G. R., “_The Development of the Vertebrate Skull_” (Oxford, 1937). Google Scholar *
Weiss, P., and Amprino, R., _Growth_, 4, 245 (1940). Google Scholar * Amprino, R., _Acta Anat._, 10, 38 (1950); _J. Exp. Zool._, 118, 71 (1951). Article CAS Google Scholar Download
references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department of Anatomy, St. Mary's Hospital Medical School, London A. D'.A. BELLAIRS Authors * A. D'.A. BELLAIRS View
author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE BELLAIRS, A. Skull
Development in Chick Embryos after Ablation of One Eye. _Nature_ 176, 658–659 (1955). https://doi.org/10.1038/176658a0 Download citation * Issue Date: 01 October 1955 * DOI:
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