hyoid apparatus

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hy·oid ap·pa·ra·tus

veterinary anatomy term for hyoid bones, a modified portion of the ancestral branchial skeleton consisting of an articulated chain of bones extending from the mastoid region of the cranium on each side to the base of the tongue; in humans, it is reduced to a single bone, os hyoideum; in a typical mammal (the dog), it consists of a tympanohyoid cartilage attached to the cranium, followed by the stylohyoid, epihyoid, keratohyoid, basihyoid, and thyrohyoid bones.
Synonym(s): apparatus hyoideus


1. shaped like Greek letter upsilon (υ).
2. pertaining to the hyoid bone.

hyoid apparatus
the suspensory mechanism for the tongue and larynx. Consists of the single basihyoid, and the paired thyrohyoid, ceratohyoid, epihyoid and stylohyoid bones and the tympanohyoid cartilages.
hyoid bone
one or more of the bones of the hyoid apparatus, fused in some species (e.g. human) to form a horseshoe-shaped bone situated at the base of the tongue, just below the thyroid cartilage. See also Table 10.
References in periodicals archive ?
For this case, advanced imaging likely would have been beneficial before surgery, especially because the cyst appeared to incorporate the jugular vein and hyoid apparatus cranially.
In the present case, complete surgical excision was deemed not possible because of the incorporation of the hyoid apparatus.
In this study, we investigated the role of the hyoid apparatus for dissipating energy with regard to its geometry.
We studied the hyoid apparatus on the adult Red-Bellied Woodpecker, Melanerpes carolinus, which is a medium sized bird living in southern United States.
The branchial horn I of the hyoid apparatus begins to ossify at the end of stage 17.
serpentina (SHEIL; GREENBAUM, 2005), branchial horns I and II of the hyoid apparatus ossify following the sequence: branchial horn I in stage 20 and branchial horn II in stage 22.
Key words: lingual entrapment, hyoid apparatus, computed tomography, avian, Chinese goose, Anser cygnoides