larynx


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Related to larynx: pharynx, trachea, Larynx cancer

larynx

 [lar´ingks] (Gr.)
the muscular and cartilaginous structure, lined with mucous membrane, situated at the top of the trachea and below the root of the tongue and the hyoid bone; it contains the vocal cords and is the source of the sound heard in speech. The larynx is part of the respiratory system; air passes through it traveling from the pharynx to the trachea on its way to the lungs and again returning to the exterior.

The larynx is composed of nine cartilages that are held together by muscles and ligament: the single thyroid, cricoid, and epiglottic cartilages and the paired arytenoid, corniculate, and cuneiform cartilages. (See also color plates.) The largest of these, the thyroid cartilage, forms the Adam's apple, which protrudes in the front of the neck. Two flexible vocal cords reach from the back to the front wall of the larynx and are manipulated by small muscles to produce sound. The epiglottis, a flap or lid at the base of the tongue, closes the larynx as it is lifted up during swallowing and so prevents passage of food or drink into the larynx and trachea.
Larynx.
artificial larynx an electromechanical device that enables a person after laryngectomy to produce speech. When the device is placed against the region of the laryngectomy a buzzing sound is made that can be converted into simulated speech by movements of the lips, tongue, and glottis. Called also electrolarynx.

lar·ynx

, pl.

la·ryn·ges

(lar'ingks, lă-rin'jēz), Avoid the misspelling/mispronunciation larnyx.
The organ of voice production; the part of the respiratory tract between the pharynx and the trachea; it consists of a framework of cartilages and elastic membranes housing the vocal folds and the muscles that control the position and tension of these elements.
[Mod. L. fr. G.]

larynx

/lar·ynx/ (lar´inks) pl. laryn´ges   [L.] the organ of voice; the air passage between the lower pharynx and the trachea, containing the vocal cords and formed by nine cartilages: the thyroid, cricoid, and epiglottis and the paired arytenoid, corniculate, and cuneiform cartilages.

larynx

(lăr′ĭngks)
n. pl. larynges (lə-rĭn′jēz) or larynxes
The part of the respiratory tract between the pharynx and the trachea, having walls of cartilage and muscle and containing the vocal cords enveloped in folds of mucous membrane.

larynx

[ler′ingks]
Etymology: Gk
the organ of voice that is part of the upper air passage connecting the pharynx with the trachea. It accounts for a large bump in the neck called the Adam's apple and is larger in men than in women, although it remains the same size in men and women until puberty. The larynx forms the caudal portion of the anterior wall of the pharynx and is lined with mucous membrane that is continuous with that of the pharynx and the trachea. The larynx extends vertically to the fourth, fifth, and sixth cervical vertebrae and is somewhat higher in women and children. It is composed of three single cartilages and three paired cartilages, all connected by ligaments and moved by various muscles. The single cartilages are the thyroid, cricoid, and epiglottis. The paired cartilages are the arytenoid, corniculate, and cuneiform, which support the vocal folds. Also called voice box. laryngeal, adj.
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Larynx: posterior view

larynx

The region of the throat between the pharynx (tip of the epiglottis) and trachea (cricoid cartilage) which contains the vocal cords and is involved in breathing, swallowing, and speech.

Boundaries
• Superolateral boundary—Tip of the epiglottis and aryepiglottic folds.
• Inferior limit—Inferior rim of the cricoid cartilage.
• Posterior limit—Posterior mucosa covering cricoid cartilage, arytenoid region, and interarytenoid space.
• Anterior limit—Lingual surface of epiglottis, thyrohyoid membrane, anterior commissure, thyroid cartilage, cricothyroid membrane, and anterior arch of the cricoid cartilage.

Regions
Supraglottis, glottis, subglottis.

lar·ynx

, pl. larynges (laringks, lă-rinjēz) [TA]
The organ of voice production, which also serves a protective function for the airway; the part of the respiratory tract between the pharynx and the trachea: it consists of a framework of cartilages and elastic membranes housing the vocal folds and the muscles that control the position and tension of these elements.
[Mod. L. fr. G.]

larynx

(lar'inks) plural.larynges [Gr.]
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LARYNX
A tube built of cartilage that begins at the pharynx and that forms the initial segment of the respiratory tree, extending from the base of the tongue to the trachea. Its closing mechanisms prevent the aspiration of liquids and solids during swallowing and allow coughing and the production of vocalizations. See: illustration

Anatomy

The framework of the larynx is built of three single cartilages and three paired cartilages. The unpaired cartilages are: the cricoid cartilage, a thick cartilage ring on top of the trachea; the thyroid cartilage, a V-shaped cartilage that sits on the cricoid with the point of its 'V' facing forward; and above this, the epiglottic cartilage, shaped like an upright paddle, with its handle held inside the front angle of the thyroid cartilage. The three smaller paired cartilages are: the arytenoids, the corniculates, and the cuneiforms. These nine cartilages are held together by membranes and ligaments, usually named by the structures that are interconnected; for example, the cricothyroid membrane connects the front of the cricoid cartilage with the base of the thyroid cartilage in the midline.

The intrinsic muscles of the larynx -- cricothyroid, posterior cricoarytenoid, lateral cricoarytenoid, thyroarytenoid, transverse and oblique arytenoids, and vocalis -- alter the length and tension of the vocal cords and the size and shape of the opening between them (the rima glottis). The vagus nerve supplies motor and sensory innervation to the larynx; the cricothyroid muscle is innervated by the external laryngeal branch of the vagus, while the other intrinsic muscles are innervated by the recurrent laryngeal branch of the vagus.

The cavity within the larynx comprises three consecutive chambers. The first chamber, the vestibule of the larynx, is a tube between the pharynx and a pair of folds, the vestibular folds (the "false vocal cords"), that protrude into the larynx. The second chamber, the ventricle of the larynx, is a short segment between the vestibular folds and the vocal folds; the ventricle has lateral recesses extending laterally under the vestibular folds. The third chamber, the infraglottic cavity (infraglottic larynx, subglottic space), is a tube between the vocal folds and the trachea.

foreign bodies in larynx

An inhaled or aspirated solid object, such as a piece of meat, hard candy, safety pin, or coin, in the larynx. Any aspirated object poses an imminent risk of airway obstruction.

Symptoms

Symptoms may include coughing, choking, dyspnea, fixed pain, or loss of voice.

Patient care

If the patient is able to speak or cough, the rescuer should not interfere with the patient's attempts to expel the object. If the patient is unable to speak, cough, or breathe, the rescuer should apply the Heimlich maneuver 6 to 10 times rapidly in succession. Using air already in the lungs, the thrusts create an artificial cough to propel the obstructing object out of the airway. If the patient loses consciousness, carefully assist him or her to the ground in a supine (face up) position. Next the rescuer should begin CPR since compressions have been shown to be effective in clearing an obstruction. With each time attempt to ventilate, the rescuer should first look in the mouth to see if there is an object that can be pulled out of the airway with gloved fingers. Previously chest thrusts were taught for an obese or pregnant patient or a child with a foreign body airway obstruction. To simplify this procedure the Emergency Cardiac Care Guidelines 2005 recommend all patients receive chest compressions following CPR. For an infant, the rescuer uses back slaps before chest thrusts. Direct laryngoscopy and the use of Magill forceps may be required to remove a foreign object. If the object cannot be readily removed with these measures, an emergency cricothyrotomy, or emergency tracheotomy may be required. See: Heimlich maneuver

larynx

The ‘Adam's apple’ or voice box. The larynx is situated at the upper end of the wind-pipe (TRACHEA), just in front of the start of the gullet (OESOPHAGUS). At its inlet is a leaf-shaped flap of cartilage, the EPIGLOTTIS, that prevents entry of swallowed food. It has walls of cartilage and is lined with a moist mucous membrane and contains the vocal cords. These are two folds of the mucous membrane that can be tensed by tiny muscles to control their rate of vibration as air passes through them, and hence the pitch of the voice. The gap between the folds is called the glottis.

larynx

a dilation of the upper part of the TRACHEA of TETRAPODS (Adam's apple in humans), occurring in the front part of the neck. It is triangular in shape (base uppermost) and is made up of 9 cartilages moved by muscles. It contains the vocal cords which are elastic ligaments embedded in two folds of mucous membrane.

Larynx

Also known as the voice box, the larynx is composed of cartilage that contains the apparatus for voice production. This includes the vocal cords and the muscles and ligaments that move the cords.

larynx (larˑ·ingks),

n the structure between the pharynx and the trachea that contains the vocal cords.
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Larynx.

lar·ynx

, pl. larynges (laringks, lă-rinjēz) [TA]
Organ of voice production; part of respiratory tract between pharynx and trachea.
[Mod. L. fr. G.]

larynx

(lar´ingks),
n the organ of voice that is part of the air passage connecting the pharynx with the trachea.

larynx

pl. larynges [Gr.] the muscular and cartilaginous structure, lined with mucous membrane, situated at the cranial end of the trachea and behind the root of the tongue and the hyoid bone. The larynx contains the vocal cords, and is responsible for vocalization; it is called also the voice box. It is part of the respiratory system, and air passes through the larynx as it travels from the pharynx to the trachea and back again on its way to and from the lungs.
The larynx is composed of nine cartilages (thyroid, cricoid and epiglottis, and the paired arytenoid, corniculate and cuneiform) held together by muscles and ligaments.
References in periodicals archive ?
This observation makes it possible to distinguish bats that produce echolocation signals with their larynx from bats that do not echolocate and those that use tongue clicks.
In the "basic" mammalian pattern, described by Laitman at the recent meeting of the American Association of Physical Anthropologists in San Diego, the larynx locks into the nasopharynx -- the air space at the back of the nasal cavity -- during breathing.
High-resolution computed tomography (CT) and magnetic resonance imaging (MRI) of the larynx demonstrated a large, well-defined, inhomogeneous, enhancing mass in the soft tissue of the cricoid cartilage.
The mass was found to be filling the right side of the larynx.
These forward-looking statements relate to DUSA and NCI DCP's intention to work together on the clinical development of Levulan PDT, finalization of clinical trial designs, NCI DCP's intention to use its resources to file an IND, DUSA's intention to provide Levulan, devices and training, maintain ownership of potential intellectual property and seek FDA approval of a potential therapy in due course, the number of Americans will oral cancer and cancer of the larynx, and the belief that ALA-PDT holds promise for the treatment of oral precancers.
A flexible nasopharyngeal endoscopic examination revealed that the larynx had been deformed and obscured by an obstructing nonulcerated mass in the supraglottic area.
But difficulties arise in patients who are obese or have throat tumors, unusually large tongues, or other unfavorable features that make it difficult or impossible for the practitioner to see the larynx.
3-6,8) In this article, we present a rare cause of life-threatening stridor in adults, a ductal cyst of the larynx that was successfully removed via endoscopic C[O.
Congenital cysts of the larynx are an unusual cause of airway obstruction in newborns.
3) Fortunately, laryngectomized patients can regain some olfactory function with the use of the larynx bypass device (figure 1).
4,5) Primary sarcomas rarely occur in the larynx and account for a mere 0.
If that tumour is pressing on the nerves affecting the larynx it could cause the signs described.