vocal cords

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vocal cords:

see larynxlarynx
, organ of voice in mammals. Commonly known as the voice box, the larynx is a tubular chamber about 2 in. (5 cm) high, consisting of walls of cartilage bound by ligaments and membranes, and moved by muscles. The human larynx extends from the trachea, or windpipe.
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Vocal cords

The pair of elastic, fibered bands inside the human larynx. The cords are covered with a mucous membrane and pass horizontally backward from the thyroid cartilage (Adam's apple) to insert on the smaller, paired arytenoid cartilages at the back of the larynx. The vocal cords act as sphincters for air regulation and may be vibrated to produce sounds. Separation, approximation, and alteration of tension are produced by action of laryngeal muscles acting on the pivoting arytenoids. Vibration of the cords produces fundamental sounds and overtones. These can be modified by the strength of the air current, the size and shape of the glottis (the opening between the cords), and tension in the cords. See Larynx, Speech

References in periodicals archive ?
A follow-up fiberscopic examination of her vocal folds found no evidence of mucosal changes suggestive of a laryngeal malignancy.
Koalas have bypassed that constraint by putting those vocal folds in a new location.
This organ contains the vocal folds, which produce and alter the pitch of sound waves.
Surprisingly enough, the laryngostroboscopy showed, as an initial description, a vocal fold paralysis of the left vocal fold in median position (Figure 1).
In 50 patients for whom 12-month vocal function data were available, significant improvement was seen in the voice handicap index; the abbreviated voice handicap index-10; maximum phonation time, which measures respiratory and sound control by having the patient hold an "ah" for as long as possible; and the S/Z ratio, an assessment of open and closed vocal fold sounds based on how long a patient can sustain a soft "sss" sound and soft "zzz" sound.
Chapter Seven, "Voice Disorders Associated with Hyperfunction" by Jennifer Oates, reviews vocal fatigue, throat discomfort, impaired voice quality, and pathological changes such as vocal fold oedema, inflammation, nodules, polyps or hemorrhage.
The otolaryngologist examines the vocal folds to look for other possible causes for the voice disorder.
The vocal folds are two bands of smooth muscle tissue that lie opposite each other.
We are very pleased with the results of the pilot study, which demonstrates that our autologous fibroblasts therapy offers real hope for patients with vocal scars as it helps improve voice by reestablishing normal mucosal pliability of the vocal folds," said David Pernock, Fibrocell Science Chairman and CEO.
Herbst and the other researchers imitated the elephant's lungs by blowing controlled streams of warm, humid air through the excised larynx while adjusting the elephant vocal folds into a phonatory, or vocal-ready, position.
The same is true of roars by lions and tigers, and, like babies, their vocal folds (commonly called vocal cords) are "very loose and gel-like" and vibrate irregularly to make roars sound rough, Titze says.
Most patients received one treatment with Radiesse, which was injected into the affected vocal fold(s) to modify the larynx and cause the vocal folds to meet at midline.