Thyroid cartilage

Thyroid cartilage

Infobox Anatomy
Name = PAGENAME
Latin = cartilago thyroidea
GraySubject = 236
GrayPage = 1073


Caption = The cartilages of the larynx.


Caption2 =
Precursor = 4th and 6th branchial arch
System =
Artery =
Vein =
Nerve =
Lymph =
MeshName = Thyroid+cartilage
MeshNumber = A02.165.257.625.870
DorlandsPre = c_12
DorlandsSuf = 12217225
The thyroid cartilage is the largest of the nine cartilages that make up the "laryngeal skeleton", the cartilage structure in and around the trachea that contains the larynx.

tructure

It is composed of two plate-like laminae that come together on the anterior side of the cartilage to form a peak, called the "laryngeal prominence". This prominence is often referred to as the "Adam's apple". The laryngeal prominence is obvious in both sexes, but it tends to be somewhat more robust in the adult male.

The lip of the thyroid cartilage just superior to the laryngeal prominence is called the "thyroid notch" or "superior thyroid notch".

Layers and articulations

The two laminae that make up the main lateral, surfaces of the thyroid cartilage extend obliquely to cover either side of the trachea. The oblique line marks the superior lateral borders of the thyroid gland.

The posterior edge of each lamina articulates with the cricoid cartilage inferiorly at a joint called the cricothyroid joint.

Movement of the cartilage at this joint produces a change in tension at the vocal folds, which in turn produces variation in voice.

The entire superior edge of the thyroid cartilage is attached to the hyoid bone by the hyothyroid membrane.

Function

The thyroid cartilage forms the bulk of the anterior wall of the larynx, and serves to protect the vocal folds ("vocal cords") which are located directly behind it.

It also serves as an attachment for several laryngeal muscles.


=Additional

ee also

* Cricoid
* Larynx
* vocal fold
* Adam's apple
* Phonation

External links

*
* (NormanAnatomyFig|larynxsagsect)


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Look at other dictionaries:

  • Thyroid cartilage — Thyroid Thy roid, a. [Gr. qyreoeidh s shield shaped; qyreo s a large, oblong shield (from qy ra a door) + e i^dos form: cf. F. thyro[ i]de, thyr[ e]o[ i]de.] 1. Shaped like an oblong shield; shield shaped; as, the thyroid cartilage. [1913… …   The Collaborative International Dictionary of English

  • Thyroid cartilage — The largest of the cartilages of the larynx (the voice box). The thyroid cartilage is formed of two approximately quadrilateral plates (called laminae) that are joined anteriorly (in the front) at an angle of from 90° to 120° to create a… …   Medical dictionary

  • thyroid cartilage — noun the largest cartilage of the larynx • Syn: ↑Adam s apple • Hypernyms: ↑cartilage, ↑gristle • Part Holonyms: ↑larynx, ↑voice box * * * noun …   Useful english dictionary

  • thyroid cartilage — the main cartilage of the larynx, consisting of two broad plates that join at the front to form a V shaped structure. The thyroid cartilage forms the Adam s apple in front of the larynx …   The new mediacal dictionary

  • thyroid cartilage — noun The largest cartilage in the larynx; the Adam’s apple …   Wiktionary

  • Oblique line of thyroid cartilage — The cartilages of the larynx. Oblique line labeled to the right. Latin linea obliqua cartilaginis thyroideae Gray s …   Wikipedia

  • Superior horn of thyroid cartilage — Infobox Anatomy Name = Superior horn of thyroid cartilage Latin = cornu superius cartilaginis thyroideae GraySubject = 236 GrayPage = 1074 Caption = The cartilages of the larynx. Posterior view. Caption2 = The ligaments of the larynx. Antero… …   Wikipedia

  • Inferior horn of thyroid cartilage — Infobox Anatomy Name = PAGENAME Latin = cornu inferius cartilaginis thyroideae GraySubject = 236 GrayPage = 1074 Caption = The cartilages of the larynx. Posterior view. Caption2 = The ligaments of the larynx. Antero lateral view. Precursor =… …   Wikipedia

  • Thyroid — Thy roid, a. [Gr. qyreoeidh s shield shaped; qyreo s a large, oblong shield (from qy ra a door) + e i^dos form: cf. F. thyro[ i]de, thyr[ e]o[ i]de.] 1. Shaped like an oblong shield; shield shaped; as, the thyroid cartilage. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • Thyroid body — Thyroid Thy roid, a. [Gr. qyreoeidh s shield shaped; qyreo s a large, oblong shield (from qy ra a door) + e i^dos form: cf. F. thyro[ i]de, thyr[ e]o[ i]de.] 1. Shaped like an oblong shield; shield shaped; as, the thyroid cartilage. [1913… …   The Collaborative International Dictionary of English

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