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FIG.4. Diagram representing the growth and stages of differentiation of the human membranous labyrinth. At 31h weeks (6-7 mm.) the ear vesicle consists of two simple pouches, into the upper of which opens the endolymphatic appendage. At 4 weeks | |||
sac.endolymph. ,sac, endolymph. duct. endolymph., | |||
(9 mm.) there is at the base of the vestibular pouch an atrium, the space destined to | |||
form the utricle and saccule. At 5 weeks (12 mm.) this space is circumscribed from the | |||
cochlear pouah below by a constriction corresponding to the ductus reuniens, and above | |||
Prom the rest of the vestibular pouch by the formation of the semicircular canals. At | |||
6 weeks (20 mm.) an ingrowth of the wall of the atrium divides it intoanupper part (utricle) and lower part (saccule). At 10 weeks (30 mm.) this partition between the utricle and saccule is complete and extends inward .in such a way asto split the orifice of the endolymphatic duct. | |||
{{Streeter1906 figures}} | {{Streeter1906 figures}} |
Revision as of 17:13, 23 July 2015
FIG.4. Diagram representing the growth and stages of differentiation of the human membranous labyrinth. At 31h weeks (6-7 mm.) the ear vesicle consists of two simple pouches, into the upper of which opens the endolymphatic appendage. At 4 weeks sac.endolymph. ,sac, endolymph. duct. endolymph., (9 mm.) there is at the base of the vestibular pouch an atrium, the space destined to form the utricle and saccule. At 5 weeks (12 mm.) this space is circumscribed from the cochlear pouah below by a constriction corresponding to the ductus reuniens, and above Prom the rest of the vestibular pouch by the formation of the semicircular canals. At 6 weeks (20 mm.) an ingrowth of the wall of the atrium divides it intoanupper part (utricle) and lower part (saccule). At 10 weeks (30 mm.) this partition between the utricle and saccule is complete and extends inward .in such a way asto split the orifice of the endolymphatic duct.
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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) |
- Mall 1906 Links: Fig 1. 14mm Embryo | Fig 2. 30mm Embryo | Fig 3. Semicircular canal | Fig 4. Membranous Labyrinth | Fig 5. Acoustic nerve complex | Fig 6. Facial-acoustic Complex | Fig 7. Facial Nerve Pig Embryo 20 cm | Fig 8. Geniculate Ganglion | Plate 1. Human Embryo 4 to 20 mm | Plate 2. Human Embryo 30 mm | Membranous Labyrinth and Nerves
Reference
Streeter GL. On the development of the membranous labyrinth and the acoustic and facial nerves in the human embryo. (1906) Amer. J Anat. 6:139-165.
Cite this page: Hill, M.A. (2024, June 26) Embryology Streeter1906 fig03.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Streeter1906_fig03.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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- Carnegie stage 23
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- File:Streeter1906 fig03.jpg
- File:Streeter1906 fig04.jpg
- File:Streeter1906 fig05.jpg
- File:Streeter1906 fig06.jpg
- File:Streeter1906 fig07.jpg
- File:Streeter1906 fig08.jpg
- File:Streeter1906 plate01.jpg
- File:Streeter1906 plate02.jpg
- Template:Streeter1906 figures