Body of hyoid bone

Infobox Bone
Name = PAGENAME
Latin = corpus ossis hyoidei
GraySubject = 45
GrayPage = 177


Caption = Hyoid bone. Anterior surface. Enlarged.


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DorlandsPre = c_56
DorlandsSuf = 12260648
The body of hyoid bone or central part is of a quadrilateral form.

* Its "anterior surface" is convex and directed forward and upward.
** It is crossed in its upper half by a well-marked transverse ridge with a slight downward convexity, and in many cases a vertical median ridge divides it into two lateral halves.
** The portion of the vertical ridge above the transverse line is present in a majority of specimens, but the lower portion is evident only in rare cases.
** The anterior surface gives insertion to the geniohyoid muscle in the greater part of its extent both above and below the transverse ridge; a portion of the origin of the hyoglossus notches the lateral margin of the geniohyoid attachment.
** Below the transverse ridge the mylohyoid, sternohyoid, and omohyoid are inserted.

* The "posterior surface" is smooth, concave, directed backward and downward, and separated from the epiglottis by the hyothyroid membrane and a quantity of loose areolar tissue; a bursa intervenes between it and the hyothyroid membrane.

* The "superior border" is rounded, and gives attachment to the hyothyroid membrane and some aponeurotic fibers of the genioglossus.

* The "inferior border" affords insertion medially to the sternohyoid and laterally to the omohyoid and occasionally a portion of the thyrohyoid. It also gives attachment to the Levator glandulae thyreoideae, when this muscle is present.

* In early life the "lateral borders" are connected to the greater cornua by synchondroses; after middle life usually by bony union.

ee also

* hyoid bone

External links

*
* (NormanAnatomyFig|larynxskel1)