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...n the NCCs disrupts NCC migration into the stapes region in PA2, affecting stapes formation. These results indicate that region-specific endodermal signals d

...d incus are derived from the cartilage of the 1st pharyngeal arch, and the stapes is derived from the cartilage of the 2nd pharyngeal arch. In ossicle develo

...ssula ante fenestram and associated structures in man 3|3]], and [[Paper - Stapes, fissula ante fenestram and associated structures in man 4|4]]) describing =Stapes, fissula ante fenestram and associated structures in man: II. From Fetus at

Manubrium of malleus(L). Meckel's cartilage. Stapes (R). Auditory tube.

...ssula ante fenestram and associated structures in man 4|4]], and [[Paper - Stapes, fissula ante fenestram and associated structures in man 5|5]]) describing =Stapes, Fissula ante fenestram and Associated Structures in man: V . From the Fetu

Anson, B. J., and Bast, T. H.: Development of the Stapes of the Human Ear, Illustrated in Atlas Series. Quart. Bull., Northwestern U '''Fig. 1.''' The malleus Embryo 7 week 18 mm, like the incus and stapes, develops from a mesenchymal blastema located within the first two branchia

i, Otocyst ; 2, pharyngo-tympanic tube ; 3, stapes ; 4, incus ; 5, malleus ; 6, ectodermal ingrowth ; 7, external auditory mea 2, malleus ; 3, incus. B. Reichert’s cartilage ; 4, stapes ;

...lato-quadrate bar (cartilaginous skeleton of maxillary process), while the stapes is an independent formation developed round the stapedial artery. It may be ...elatinous tissue is absorbed, so that the malleus and incus and developing stapes, with the chorda tynipani, become surrounded by the hypoblasts lining of th

Manubrium of malleus(L). Meckel's cartilage. Stapes (R). Auditory tube.

...the reader’s right); it has not yet been carried medialward to invest the stapes (at the reader’s left). ...anic mucous membrane has reached adult extent at this level, investing the stapes and covering the medial wall of the middle-ear cavity.

...ther the first or second arch. Cope and Frazer described the origin of the stapes as 'peri-arterial.' O. Hertwig regards its origin as uncertain. Finally one ...he auditory epithelium would furnish a means of testing to what extent the stapes homologue together with its stapedial plate can develop in the absence of a

* '''ST''' - stapes

...uated between the tympanic wall of the bony vestibuli with its articulated stapes, and the vestibular chambers of the membraneous labyrinth. This is the spat ...mm. embryo that has just been referred to. There is now just opposite the stapes one space which is much larger than the adjoining spaces. On part of its ma

...Stage 18 and 19 a mesenchymal bridge forms by the interhyale which bridges stapes and cranial part laterohyale (Reichert’s cartilage). And by stage O’Rah ...s tendon was observed and the stapedius tendon attached at the back of the stapes head.The anlage of the pyramidal eminence formed around week 12-14 and arou

incus, and stapes), with their ligaments. ...s elongated from before backwards. It is occupied by the foot-piece of the stapes, and the annular ligament which connects the circumference of the foot-piec

stapes. It is developed in the reticulum that fills the interval situated between the saccule, utricle, and the cartilaginous stapes. Even before the general periotic

...fy (Meckel’s cartilage), second arch may chondrify (Reichert’s cartilage), stapes and stapedius commence. Auricular hillocks merge to form auricle primordia. ** Stapes - Pharyngeal Arch 2 cartilage Neural crest (ectoderm)

...fore no radical innovation in the fact that the incus articulates with the stapes. ...lii (supra-angular) ; q, quadrate ; s, squamosal ; sa, supra-angular ; st, stapes (columella auris) ; /, tympanic (angular).

* '''ST''' - stapes

...nanubrium or handle of the malleus ; tjy. tegmen tympani ; ?'. incus ; st. stapes ; i.hy. interhyal ligament ; st.h. stylohyal cartilage ; h.h. hypohyal ; b. ...end of the mandibular arch, and its rounded head comes in contact with the stapes (Fig. 136, sf) which is segmented from the fenestra ovalis.