File:Kollmann757.jpg

Fig. 757. Middle ear of a human fetus 8 cm CRL

The ear drum is removed.

(Anatomical Collection in Basel.)

In the cavity are the three ossicles auditus. The hammer is in connection with the Meckel's cartilage. Behind the ossicles auditus is the Paries labyrinthica. Behind the root of the styloid process stylomastoid foramen is found with the N. facial nerve, whose course in the cavum tympani is still a far stretch freely. The tympanic annulus (yellow because of covering bone) limits the Paries membranous, consisting in the absence of the eardrum, the figure only from the open top cartilage ring.

Comparisons for the evolution of the tympanic cavity is found in the osteology section: Cranium the Fig. 262 and Fig. 264.

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 24) Embryology Kollmann757.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Kollmann757.jpg

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Fig. 757. Mitteiohrraum^ Cavum tympani emes menschlichen Fetus

von 8 cm Scheitelsteißlänge. Das Trommelfell ist entfernt.

(Anatomische Sammlung in Basel.)

Im Cavum befinden sich die drei Ossicula auditus. Der Hammer steht in Verbindung mit dem M eck eischen Knorpel. Hinter den Ossicula auditus liegt die Paries labyrinthica. Hinter der Wurzel des Processus styloideus be- findet sich das Foramen stylomastoideum mit dem N. facialis, dessen Verlauf im Cavum tympani noch eine Strecke weit frei liegt. Der Annulus tympanicus (gelb weil ein Belegknochen) begrenzt die Paries membranacea, die beim Fehlen des Trommelfelles in der Abbildung nur aus dem nach oben offenen Knorpel- ring besteht.

Vergleiche für die Entwicklungsgeschichte des Cavum tympani auch in dem Abschnitt Osteologie: Cranium die Figg. 262 und 264.