File:Kollmann756.jpg

Fig. 756. Coronal section through the tympanic region of human fetus 11 cm CRL

(End of 4th month) (After Harnmar.)

The section passes through the outer ear, the ear canal, the recessus meatus and the tympanic cavity and meets the ear capsule in the region of the cochlea. The cavum tympani is a form which is shown in Fig 755 as full screen. The epitympanale area does not yet exist, but is later seen by the position taken by the average hammer head, the bottom of the cartilaginous ear canal shows a section, it corresponds to the primary auditory canal and a membranous portion, which goes into the ear gangrecessus. The recessus meatus acustici externi is highlighted, approached from the ear canal plate (lamina epithelialis meatus), the above is shown in Fig 753 and Fig 754.

This text is a Google translate computer generated translation and may contain many errors.

Images from - Atlas of the Development of Man (Volume 2)

(Handatlas der entwicklungsgeschichte des menschen)

Kollmann Atlas 2: Gastrointestinal | Respiratory | Urogenital | Cardiovascular | Neural | Integumentary | Smell | Vision | Hearing | Kollmann Atlas 1 | Kollmann Atlas 2 | Julius Kollmann

Links: Julius Kollman | Atlas Vol.1 | Atlas Vol.2 | Embryology History

Historic Disclaimer - information about historic embryology pages

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)

Reference

Kollmann JKE. Atlas of the Development of Man (Handatlas der entwicklungsgeschichte des menschen). (1907) Vol.1 and Vol. 2. Jena, Gustav Fischer. (1898).

Cite this page: Hill, M.A. (2024, April 18) Embryology Kollmann756.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Kollmann756.jpg

What Links Here?

© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

Fig. 756. Frontalschnitt durch die PaykenhShle eines Menschenfetus von

11 cm Scheitelsteifilänse.

(Ende des 4. Monats.) (Nach Harn mar.)

Der Schnitt geht durch das äußere Ohr, den äußeren Gehörgang, den Recessus meatus, und trifft das Cavum tympani und die Ohrkapsel im Bereich der Cochlea. Das Cavum tympani zeigt eine Form, welche in der Fig. 755 als Vollbild dargestellt ist. Der epitympanale Raum besteht noch nicht, doch ist die spätere Lage ersichtlich durch den vom Schnitt getroffenen Hammerkopf; der Boden des Gehörganges zeigt einen knorpeligen Abschnitt, er entspricht dem primären Gehörgang und einem häutigen Abschnitt, der in den Gehör- gangrecessus übergeht. Der Recessus meatus acustici externi ist hervorge- gangen aus der Gehörgangsplatte (Lamina epithelialis meatus), die oben in den Figg. 753 und 754 dargestellt ist.