Fig. 11. Reconstruction of the ﬁssular region of the otic capsule in a 180 mm
Reconstruction of the ﬁssular region of the otic capsule in a 180 mm. (21 week) fetus (Wisconsin series 45-b) with stapes removed; X 7: (a) viewed from a posterosuperior position, that is, looking toward the anterior wall of the vestibular window and into both oriﬁces of the ﬁssula ante fenestram; (b) viewed from a posteroinferior position, looking upward into the vestibular oriﬁce of the ﬁssula; (c) viewed from a lateral (tyrnpanic) position, looking toward the outer wall of the capsule, where occur, in this specimen, paired tympanic openings of the ﬁssula. Part c is of a block less inclusive than that shown in a and b.
In this specimen the ﬁssula is of aberrant form, being both taller and wider than usual. A cupola-like extension is prolonged cranialward beyond the horizontal level of the tympanic oriﬁce. It contains cartilage (not represented in the reconstruction).
Anson BJ. and Cauldwell EW. Stapes, fissula ante fenestram and associated structures in man: V . From the fetus of 160 mm to term. (1948) 48(3): 263-300.
Cite this page: Hill, M.A. (2019, January 19) Embryology Anson1948 fig11.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Anson1948_fig11.jpg
- © Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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