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==Figs. 3 and 4. Reconstruction of human stapes== {{Stapes}} semidiagrammatic. x 45. 262

==Figs. 5 to 8. Excised specimens of human stapes== {{Stapes}} (see footnote 4). x 20.

==Figs. 1 and 2. Reconstructions of human stapes== Human {{Stapes}} semi-diagrammatic (see footnote 4) x 45. 260

:'''Links:''' {{Stapes}} [[Category:Hearing]][[Category:Middle Ear]][[Category:Stapes]][[Category:Fetal]]

==Fig. 2. Photomicrographs of 202 mm and 310 mm fetus stapes and incus== Photomicrographs of the neck and head of the stapes and of the lentieular process of the incus, showing erosion of the cartilag

==Middle Ear - Stapes== A. Left stapes. B. Base of stapes, medial surface.

...al base and of the basal extremities of the crura. The dotted lines on the stapes indicates the approximate limits of the ossifying area; to either side of t

==Fig. 12. Drawings of a reconstruction of the stapes in the 180 mm Fetus== ...n the 180 mm. (21 week) fetus (Wisconsin series 45 B); X 7: (a) the entire stapes, in superolateral view; (1)) segment 1 (see inset), viewed from below (that

==Fig. 14. Drawings of a reconstruction of the stapes in a 240 mm== ...d of the base seen as though from the obturator space; (c) the neck of the stapes (capital portion removed) and the adjacent portions of the two crura, in la

==Fig. 1. Photomicrographs of the base and crus of the stapes, showing progressive stages in the removal of cartilage and the formation o ...l) bone which forms one of the two constituent lamellas in the base of the stapes.

==Fig. 15. Drawings of a reconstruction of the stapes in a 275 mm== The stapes has attained adult form; of the crura, now deeply channeled, the posterior

...right ear; all represent the transverse level of the posterior crus of the stapes. ...the incus. Destruction of periosteal bone on the obturator surface of the stapes keeps pace with the formation of endochondral bone within the capital and b

==Fig. 3. Drawings of the stapes and the adjacent fissular region of the otic capsule== Drawings (semi-diagrammatic) from Edinger tracings of the stapes and the adjacent fissular region of the otic capsule, showing developmenta

...zone. In I) of figure 10 the hummocks exposed in the basal portion of the stapes are composed chiefly of calcified cartilage; their summits are capped by e

...cavity by ligaments: three for the malleus, and one each for the incus and stapes. ...estra vestibuli by a fibrous ring, the annular ligament of the base of the stapes (lig. annulare baseos stapedis).

...19, through the middle of the fissular tract and the posterior crus of the stapes; c, through the vestibular orifice of the fissula, and d to- f, from sect ...er way; bone is formed on the obturator aspect of the base and crus of the stapes and on the tympanic and vestibular walls of the otic capsule. Concurrently,

==Fig. 13. Drawings of a reconstruction of the stapes in a 210 mm== Drawings of a reconstruction of the stapes in a 210 mm. (23 week) fetus (Wisconsin series 51) ; X 7: (a) reconstructio

The malleus, like the incus and stapes, develops from a mesenchymal blastema located within the first two branchia ...mates the portion of the stapedial ring destined to become the head of the stapes.

...um of tympanic membrane (L). Manubrium of malleus (L). Meckel's cartilage. Stapes (R). Auditory tube. Basal turn of cochlea duct (L). Endolymphatic sac (R).

==Figs. 7 to 12. Reconstructions of the stapes; superior and medial views== In these and in the succeeding figures ant. crus. indicates anterior crus of stapes; cart. or cartil., cartilage; far. c., facial canal ; fen. cart, fenestral

...is grooved by the facial nerve. Part of this mass is the primordium of the stapes. However, it is still separate from the aggregation of which will become th ...a point on the hyoid bar (at II) just distal to the blastemal lobe of the stapes (fig. 1c). The primordia of the malleus and incus are not yet distinct stru

...structions of the osseous and the cartilaginous portion of the base of the stapes== In these and in the succeeding figures ant. crus. indicates anterior crus of stapes; cart. or cartil., cartilage; far. c., facial canal ; fen. cart, fenestral

==Fig. 1 to 6. Reconstructions of the stapes - superior and medial views== In these and in the succeeding figures ant. crus. indicates anterior crus of stapes; cart. or cartil., cartilage; far. c., facial canal ; fen. cart, fenestral

...F.E., foramen endolymphaticum ; Mall., malleus; S.Oc, supraoccipital; Si., stapes; Sy.N., sympathetic nerve; FJJ, posterior, hyomandibular branch of the faci

...d neck and head of the stapes (345 mm., e). Thus, with regard to form, the stapes is essentially an adult ossicle in the 290 mm. fetus (d) ; with respect to

...nanubrium or handle of the malleus ; tjy. tegmen tympani ; ?'. incus ; st. stapes ; i.hy. interhyal ligament ; st.h. stylohyal cartilage ; h.h. hypohyal ; b.

abuts against the stapes it will be noted that it also is beginning to spread over

...sti., scala vestibuli; Sc. tym., scala tympani; imp. Sta.p., impression of stapes; Sac. end., endolyrnphatic duct; Sm:., sacculus; Ut1'z'c., utriculus; Duct.

...., medullary tube; sae., saccule; s.s.d., superior semicircular duct; st., stapes; utr., utricle; vest, vestibular part of vesicle; u.e.d., utriculo-endolymp

...., medullary tube; sae., saccule; s.s.d., superior semicircular duct; st., stapes; utr., utricle; vest, vestibular part of vesicle; u.e.d., utriculo-endolymp

...., medullary tube; sae., saccule; s.s.d., superior semicircular duct; st., stapes; utr., utricle; vest, vestibular part of vesicle; u.e.d., utriculo-endolymp

...ossula rotunda. which lies over the pouch. Above this the facial nerve and stapes are seen cut, their other parts remaining on the other portion of the model

...., medullary tube; sae., saccule; s.s.d., superior semicircular duct; st., stapes; utr., utricle; vest, vestibular part of vesicle; u.e.d., utriculo-endolymp

...shown in green. Although the greater part of the cistern abuts against the stapes, it will be noted that it is also begiiming to spread over the liorsal surf * Impressio staped., area in contact with base of stapes

Middle ear: Ossicles - Malleus, Incus and Stapes

...., medullary tube; sae., saccule; s.s.d., superior semicircular duct; st., stapes; utr., utricle; vest, vestibular part of vesicle; u.e.d., utriculo-endolymp

...., medullary tube; sae., saccule; s.s.d., superior semicircular duct; st., stapes; utr., utricle; vest, vestibular part of vesicle; u.e.d., utriculo-endolymp

...sti., scala vestibuli; Sc. tym., scala tympani; imp. Sta.p., impression of stapes; Sac. end., endolyrnphatic duct; Sm:., sacculus; Ut1'z'c., utriculus; Duct.

The cartilaginous stapes was removed from this model and the oval impression that it makes on the ci * Impressio staped., area in contact with base of stapes

Middle ear: Ossicles - Malleus, Incus and Stapes

...sti., scala vestibuli; Sc. tym., scala tympani; imp. Sta.p., impression of stapes; Sac. end., endolyrnphatic duct; Sm:., sacculus; Ut1'z'c., utriculus; Duct.

...art of the hyoid cartilage. The ends of this "U" shaped cartilage form the stapes of the middle ear ossicles.

...., medullary tube; sae., saccule; s.s.d., superior semicircular duct; st., stapes; utr., utricle; vest, vestibular part of vesicle; u.e.<l., utriculo-endolym

...is. The long crus of the incus approximates the future capital part of the stapes but is separated from the manubrium by the chorda tympani. The loose mesenc

...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

...., medullary tube; sae., saccule; s.s.d., superior semicircular duct; st., stapes; utr., utricle; vest, vestibular part of vesicle; u.e.d., utriculo-endolymp

abuts against the stapes it will be noted that it also is beginning to spread over

...th (Carnegie Collection, No. 1018) enlarged 9 diameters. The cartilagenous stapes was removed from this model and the oval impression that it makes on the ci

The stapes is now excavated on the obturator surface of the base (a and b), at the bas

...th (Carnegie Collection, No. 1018) enlarged 9 diameters. The cartilagenous stapes was removed from this model and the oval impression that it makes on the ci