File:Streeter1922-fig02.jpg - Revision history

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	[[Category:Human]] [[Category:Hearing]]		[[Category:Human]] [[Category:Hearing]][[Category:Outer Ear]]

Z8600021: /* Fig. 2. Human adult auricle */

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Fig. 2. Human adult auricle

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	The cavities (fossae articulares) of eminences and the plica principalis projecting between two median eminences (see [[:File:Streeter1922-fig01.jpg\|fig 1]]) as a strengthening ridge.		The cavities (fossae articulares) of eminences and the plica principalis projecting between two median eminences (see [[:File:Streeter1922-fig01.jpg\|fig 1]]) as a strengthening ridge.

			===Terms===

			* '''Anthelix''' - The rounded brim of the concha, from which the secondary part of the. auricle flares out as the scapha-helix. (See fig. 2.)
			* '''Antitragus''' - The thickened ventral rim of the concha, situated between the incisura intertragica and the anthelix. Apparently a part of the closure mechanism.
			* Cavitas conchas - see Concha.
			* '''Concha''' - The shell-shaped primary part of the auricle immediately surrounding the meatus. As previously used, the term included only the cymba conchas and the cavitas concha?. Streeter 1922 - In this paper I have extended the term to include also what has been known as the fossa triangularis. The contour of the concha thus is outlined by the tragus, incisura intertragica, antitragus, anthelix, and crus helicis.
			* '''Crus helicis''' - Formerly restricted to the horizontal portion of the helix, forming a transverse ridge in the floor of the concha. In this paper the term is extended to include all that part of the helix derived from the mandibular arch. (See fig. 2.) It constitutes the lateral free edge of the pars articularis concha?, differing in structure and development from the remainder of the helix.
			* Darwin's tubercle - See Tuberculum auricula.
			* '''Eminentia articularis inferior''' - See Eminentia articularis superior, formerly known as eminentia concha.
			* '''Eminentia articularis superior''' - Same as eminentia fossae triangularis. The pars articularis of the concha, as viewed from the median side, presents two eminences which constitute the chief area of contact of the auricle with the skull. In this paper these are designated, respectively, eminentia articularis superior and eminentia articularis inferior. (See fig. 1.) The groove between them is the sulcus corresponding to the plica principalis.
			* Fossa angularis - [His]. Name applied to the first branchial cleft when modified by the formation of the auricular hillocks, five of which form a plump ring around it.
			* '''Fossa articularis inferior''' - Same as cymba concha. See Fossa articularis superior.
			* '''Fossa articularis superior''' - Same as fossa triangularis. When the pars articularis concha? is viewed from the lateral side, its floor presents two fossa? (superior and inferior) separated by the plica principalis. (See fig. 2.)
			* Fossa conchae - [Hammar]. Essentially the same as fossa angularis.
			* Free ear-fold - or freien Ohrfalte [Schwalbe]. The ridge representing first appearance of definitive auricle. Same as helix hyoidalis [Gradenigo], cauda helicis [His], or primitive scapha [Henneberg].
			* '''Helix''' - In adult man the rolled-in margin of the auricle, when viewed as a whole from the lateral side, resembles in outline a coiled spring and on this account it was termed helix. Included under it are parts that are quite different, both embryologically and structurally. Furthermore, it is not applicable to the auricle of other animals. If the term scapha be used for all of the auricle peripheral to the anthelix, and the term helix used for the rolled edge of the scapha, where this occurs, the difficulty is then largely removed. It is so used in this paper, and under scapha-helix will be designated only those parts of the secondary auricle derived from the hyoid arch. The crus helicis is a different structure. The lobulus auricula? is a part of the secondary auricle and bears a similar relation to the concha as does the scapha. (See fig. 2.)
			* '''Lobulus auriculae''' - The free edge of the auricle below the antitragus continuous with the scapha helix. See Helix.
			* '''Plica principalis''' - [Boas]. Equivalent to crus inferius anthelicis. Introduced because it is more accurately applied, particularly to the auricle of mammals other than man.
			* '''Scapha''' - Concave surface of the free portion of the auricle lying between the anthelix and the helix. Term applied by Henneberg to the entire free auricle from the anthelix to the free border. He applies the term helix to the unwrinkled border of the scapha.
			* '''Spina helicis''' - Cartilaginous process extending forward from the pars articularis concha?. (See fig. 1.) It is not in reality a part of the helix. It is supposed that this structure is enlarged and becomes detached in some mammals to form the scutulum.
			* '''Tragus''' - The thickened margin of the anterior wall of the concha, situated between the incisura intertragica and the crus helicis. Regarded as a part of the closure mechanism.
			* Tuberculum anthelicis - [His]. Auricular hillock No. 4.
			* Tuberculum intermedius - [His]. Auricular hillock No. 3, the one at the top of the first branchial Cleft.

Z8600021 at 01:55, 27 Ocak 2013

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	[[Category:Human]] [[Category:Hearing~~]] [[Category:Carnegie Embryo 1787~~]]		[[Category:Human]] [[Category:Hearing]]

Z8600021 at 01:53, 27 Ocak 2013

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	==Fig. 9. ~~Drawing made directly from an embryo 6 mm long~~==		==Fig. 2. Human adult auricle==

	~~No. 1787 Carnegie Collection. X 22.~~ The ~~olfactory disk~~ and the ~~lens of the eye are outlined by dots.~~		The cavities (fossae articulares) of eminences and the plica principalis projecting between two median eminences (see [[:File:Streeter1922-fig01.jpg\|fig 1]]) as a strengthening ridge.

	~~Plate 1. Ventrolateral view of the head in a series of human embryos~~ [[:File:Streeter1922-~~fig09~~.jpg\|~~Fig. 9. Embryo 6 mm~~]] ~~\| [[:File:Streeter1922-fig10.jpg\|Fig. 10. Embryo 12 mm]] \| [[:File:Streeter1922-fig11.jpg\|Fig. 11. Embryo 14 mm]] \| [[:File:Streeter1922-fig12.jpg\|Fig. 12. Embryo 18 mm]]~~

	~~Ventrolateral view of the head in~~ a series of human embryos, showing the change in topography of the auricle in the course of its development. The surface area of the mandibular and hyoid bars entering into the formation of the auricular primordium is colored blue. These figures show the lateral and dorsal migration of the auricle coincident with the formation of the mandible.

Z8600021: ==Fig. 9. Drawing made directly from an embryo 6 mm long== No. 1787 Carnegie Collection. X 22. The olfactory disk and the lens of the eye are outlined by dots. Plate 1. Ventrolateral view of the head in a series of human embryos [[:File:Streeter1922-fig

2013-01-27T01:50:35Z

New page

==Fig. 9. Drawing made directly from an embryo 6 mm long==

No. 1787 Carnegie Collection. X 22. The olfactory disk and the lens of the eye are outlined by dots.

Plate 1. Ventrolateral view of the head in a series of human embryos [[:File:Streeter1922-fig09.jpg|Fig. 9. Embryo 6 mm]] | [[:File:Streeter1922-fig10.jpg|Fig. 10. Embryo 12 mm]] | [[:File:Streeter1922-fig11.jpg|Fig. 11. Embryo 14 mm]] | [[:File:Streeter1922-fig12.jpg|Fig. 12. Embryo 18 mm]]

Ventrolateral view of the head in a series of human embryos, showing the change in topography of the auricle in the course of its development. The surface area of the mandibular and hyoid bars entering into the formation of the auricular primordium is colored blue. These figures show the lateral and dorsal migration of the auricle coincident with the formation of the mandible.

{{Streeter1922}}

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[[Category:Human]] [[Category:Hearing]] [[Category:Carnegie Embryo 1787]]