Infrahyoid

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Related to Infrahyoid muscles: thyroid gland, Strap muscles

In`fra`hy´oid


a.1.(Anat.) Same as Hyosternal (a).
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The hypoglossal nerve is the twelfth cranial nerve, and is a pure motor nerve that is involved in the movements of the tongue and infrahyoid muscles.
Infrahyoid muscles are reflected downward exposing the superior half of the thyroid lamina (black arrow), and an inferiorly based thyroid perichondrial flap is created (white arrow).
Finally, infrahyoid muscles, represented by esternohyoideous, pull the hyoid bone inferiorly and subsequently providing their return to resting position characterizing the end of swallowing [31,32].
Various anomalous suprahyoid and infrahyoid muscles have been reported in the literature e.
It is commonly associated with the poor development of the articular fossa, laxity of the temporomandibular ligament or joint capsule, and excessive activity of the lateral pterygoid and infrahyoid muscles due to drug use or disease.
With the animal in the supine position after a vertical midline cervicotomy, the infrahyoid muscles were separated from the tracheal axis.
There are another three suprahyoid muscles: the geniohyoid, stylohyoid and mylohyoid, which are also inserted in the hyoid bone and, together with the digastric muscle, anchor this bone against the traction of the infrahyoid muscles (Lockhart et al.
As a consequence, exaggerated tension of the supra- and infrahyoid muscles in the dorsocaudal direction is produced, which promotes an increase in tongue muscle tension that leads to imprecise and slurred speech articulation.
An incision lengthed about 5-8 cm was made two fingerbreadths from the suprasternal notch to cut open the skin and subcutaneous tissues, and to separate loose connective tissues of bilateral sternocleidomastoid muscles and infrahyoid muscles until the upper and lower planes of side thyroid lobes.
It can be unilateral or bilateral more frequently arising from the left lobe it can be Glandular, Fibrous, Fibro-muscular with one or two or three slips, it is thought to represent the detached part of infrahyoid muscles, may be innervated by a twig from ansa cervicalis.
The infrahyoid muscles were then closed to recreate the anatomic plane.