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Saturday November 21, 2009 9:04 am
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The Human Skull |
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The hyoid is a single small "u" shaped bone in the adult
which does not articulate with any other bone. It is suspended from the styloid
process of each temporal bone by means of the stylohyoid ligaments. It is
located in the mid-sagittal plane, at the front of the throat, and beneath the
mandible but above the larynx near the level of the third cervical vertebrae. It
is formed from three separate parts (i.e., the body,and the left and right
greater and lesser cornu) which fuse in early adulthood. The base of the "u"
shaped bone is located anteriorly while the cornu project posteriorly.
The hyoid is closely associated with the skull but is not strictly a part of it.
It anchors muscles, especially those of the tongue, and is the only bone in the
body which is not linked to another. The blood vessels into and out of the hyoid
bone are small branches of the external carotid artery, and are called "superior
thyroid arteries" and "superior thyroid veins."
The hyoid does not articulate with (i.e., touch) any other bones.
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