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Vestibular fold

Part of the larynx

Field	Value
Name	Vestibular fold
Latin	plica vestibularis, plica ventricularis
Image	Gray956.png
Caption	Laryngoscopic view of the vocal folds. (Vestibular fold labeled at center right.)
Image2	Kehlkopf Pferd.jpg
Caption2	Cut through the larynx of a horse:

1 hyoid bone 2 epiglottis 3 vestibular fold, false vocal fold/cord, (Plica vestibularis) 4 vocal fold, true vocal fold, (Plica vocalis) 5 Musculus ventricularis 6 ventricle of larynx (Ventriculus laryngis) 7 Musculus vocalis 8 Adam's apple (thyroid cartilage) 9 rings of cartilage (cricoid cartilage) 10 Cavum infraglotticum 11 first tracheal cartilage 12 Windpipe (Trachea) The vestibular fold (ventricular fold, superior or false vocal cord) is one of two thick folds of mucous membrane, each enclosing a narrow band of fibrous tissue, the vestibular ligament, which is attached in front to the angle of the thyroid cartilage immediately below the attachment of the epiglottis, and behind to the antero-lateral surface of the arytenoid cartilage, a short distance above the vocal process.

The lower border of this ligament, enclosed in mucous membrane, forms a free crescentic margin, which constitutes the upper boundary of the ventricle of the larynx.

They are lined with respiratory epithelium, while true vocal cords have stratified squamous epithelium.

Function

The vestibular folds of the larynx play a significant role in the maintenance of the laryngeal functions of breathing and preventing food and drink from entering the airway during swallowing. They aid phonation (speech) by suppressing dysphonia. In some ethnic singing and chanting styles, such as in Tuva, Sardinia, Mongolia, South Africa, and Tibet (...) the vestibular folds may be used in co-oscillation with the vocal folds, producing very low or high pitched sounds (most of the time, one octave higher). Conversely, people who have had their epiglottis removed because of cancer do not choke any more than when it was present.*A self-sustained vocal-ventricular phonation mode: acoustical, aerodynamic and glottographic evidences *; L Fuks, B Hammarberg, J Sundberg; https://www.researchgate.net/profile/Johan_Sundberg/publication/285742169_A_self-sustained_vocal-ventricular_phonation_mode_Acoustical_aerodynamic_and_glottographic_evidences/links/56e91a0f08ae9bcb3e1dbed8.pdf; "Trans-oral partial epiglottidectomy to treat dysphagia in post-treatment head and neck cancer patients"; Jamal, Erman, Chhetri; https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3841234

Society and culture

They have a minimal role in normal phonation, but are often used to produce deep sonorous tones in Tuvan throat singing,{{Citation | access-date = 2010-01-05

References

''Vestibular fold flap for post-cordectomy laryngeal reconstruction''; Mamede, Ricz, Aguiar-Ricz, Mello-Filho; [http://oto.sagepub.com/content/132/3/478.abstract Abstract]

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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