- Thyroarytenoid muscle
Name = PAGENAME
Latin = musculus thyroarytenoideus
GraySubject = 236
GrayPage = 1083
Caption = Muscles of the
larynx, seen from above.
Origin = Inner surface of the
thyroid cartilage(anterior aspect)
Insertion = Anterior surface of
Nerve = recurrent laryngeal branch of the
Action = helps to adduct the
vocal foldsduring speech
DorlandsPre = m_22
DorlandsSuf = 12551138
The Thyroarytenoid is a broad, thin, muscle which lies parallel with and lateral to the
vocal fold, and supports the wall of the ventricle and its appendix.
Origin and insertion
It arises in front from the lower half of the angle of the
thyroid cartilage, and from the middle cricothyroid ligament.
Its fibers pass backward and lateralward, to be inserted into the base and anterior surface of the arytenoid cartilage.
Parts of thyroarytenoid
The lower and deeper fibers of the muscle can be differentiated as a triangular band which is inserted into the vocal process of the arytenoid cartilage, and into the adjacent portion of its anterior surface; it is termed the "Vocalis", and lies parallel with the
vocal ligament, to which it is adherent. [eMedicineDictionary|Vocalis+muscle]
A considerable number of the fibers of the Thyreoarytænoideus are prolonged into the
aryepiglottic fold, where some of them become lost, while others are continued to the margin of the epiglottis. They have received a distinctive name, "Thyreoepiglotticus" or "Thyroepiglottic", and are sometimes described as a separate muscle. [eMedicineDictionary|Thyroepiglottic+muscle]
A few fibers extend along the wall of the ventricle from the lateral wall of the
arytenoid cartilage to the side of the epiglottis and constitute the "Ventricularis" muscle.
The Thyreoarytœnoidei, consisting of two parts having different attachments and different directions, are rather complicated as regards their action.
Their main use is to draw the arytenoid cartilages forward toward the thyroid, and thus relax and shorten the vocal folds.
But, owing to the connection of the deeper portion with the vocal fold, this part, if acting separately, is supposed to modify its elasticity and tension, while the lateral portion rotates the arytenoid cartilage inward, and thus narrows the rima glottidis by bringing the two vocal folds together.
Wikimedia Foundation. 2010.
Look at other dictionaries:
thyroarytenoid muscle — n THYROARYTENOID * * * musculus thyroarytenoideus … Medical dictionary
thyroarytenoid muscle — noun : thyroarytenoideus … Useful english dictionary
thyroarytenoid — Relating to the thyroid and arytenoid cartilages. See t. (muscle). * * * thy·ro·ar·y·te·noid .ar ə tē .nȯid, ə rit ən .ȯid n a broad thin muscle that arises esp. from the thyroid cartilage, inserts into the arytenoid cartilage, and functions to … Medical dictionary
Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… … Medical dictionary
Muscle — For other uses of Muscle , see Muscle (disambiguation). A top down view of skeletal muscle Muscle (from Latin … Wikipedia
Vocal muscle — Infobox Muscle Name = PAGENAME Latin = musculus vocalis GraySubject = 236 GrayPage = 1083 Caption = Muscles of the larynx, seen from above. Caption2 = Origin = Insertion = Blood = Nerve = recurrent laryngeal nerve Action = Antagonist =… … Wikipedia
Mylohyoid muscle — Muscles of the neck. Anterior view. Mylohyoid muscle colored in bright red … Wikipedia
Levator claviculae muscle — Latin musculus levator claviculae Origin Anterior portion of transverse processes of C1 C4 vertebrae Insertion Lateral half of the clavicle … Wikipedia
Digastric muscle — Muscles of the neck. Lateral view … Wikipedia
Obliquus capitis inferior muscle — Deep muscles of the back. (Obliq. infer. labeled at upper left.) Latin musculus obliquus capitis inferior … Wikipedia