Thyroid Cartilage


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

thyroid cartilage

[′thī‚rȯid ‚kärt·lij]
(anatomy)
The largest of the laryngeal cartilages in humans and most other mammals, located anterior to the cricoid; in humans, it forms the Adam's apple.

Thyroid Cartilage

 

the large unpaired cartilage of the larynx, which first appeared in vertebrate evolution in mammals.

The thyroid cartilage develops from the second and third gill arches. In cloacal animals the arches retain their independence, being joined to the copula, while in marsupial and placental animals they are fused, forming two quadrilateral lamellae that are united at an angle on the ventral side (in humans on the anterior side). In children and women these lamellae are united at an obtuse angle; in men they form an angular projection, known as the Adam’s apple. From the thyroid cartilage there pass the anterior cornua (in humans the superior cornua), in the direction of the hyoid bone (they are absent in pigs), and the posterior cornua (in humans the inferior cornua), which form a movable articulation with the cricoid cartilage.

References in periodicals archive ?
The muscle parts attaching to the thyroid cartilage were incised to expose the lamina of the cartilage and TF clearly.
An injection needle (1.1 x 40 mm, 21# Sterican Hypodermic Needle; Braun Melsungen AG, Melsungen, Germany) is used to mark a point [C in [Figure 1] on the thyroid lamina 2 mm at least anterior to the reference point [B in [Figure 1] and 5 mm superior to the inferior margin of the thyroid cartilage in men and 4 mm in women.
Strauss, "Stable 3d mass-spring models for the segmentation of the thyroid cartilage," in Proceedings of the DAGM, Otto-von-Guericke-Universitat Magdeburg, Vienna, Austria, August 2005.
Then, we proceeded to the external approach, and thyroid cartilage window with a Skeeter drill window of 12 mm [2] was made and the foreign body was retrieved (Figures 2 and 3).
(2006) performed a study on 36 cadavers, and found that the CCA bifurcated at the level of the body of the hyoid bone in 15 (88.9%), at the superior border of thyroid cartilage in 11 (42.3%), and at the tip of the greater horn of hyoid bone in 8 (15%) cadavers.
During thyroid surgery two possible sites of tracheal injury exist: at the isthmus, when the thyroid is separated from the trachea, and at the area where the recurrent laryngeal nerve enters the thyroid cartilage during lateral and posterior dissection [13].
After the sternocleidomastoid muscle and the strap muscle were identified, we cut through the linea alba cervicalis incision with a harmonic scalpel between the strap muscles from the suprasternal notch to thyroid cartilage. The general principle of surgical procedures for robotic total thyroidectomy was the same as conventional open thyroidectomy.
A post mortem examination by a Home Office pathologist concluded the victim died from injuries consistent with a ligature compression of the neck, including fractures of the thyroid cartilage.
Particular findings include horizontal thyroid cartilage fractures (Figure 1), fractures of the superior thyroid cornua as well as hyoid fractures (Figure 2), malalignment and malposition injuries.
Eventually, each recurrent laryngeal nerve enters the larynx between the inferior cornu of the thyroid cartilage and the arch of the cricoid, branching after laryngeal penetration in two-thirds of cases.
c) The thyroid cartilage is seen as a hypoechoic structure in relation to the vocal cords and it is one of the structures best visualized under ultrasound.