Vocal folds

Vocal folds, also known as vocal cords, are a pair of soft tissue structures located in the larynx that play a crucial role in human phonation. They are essential for producing sounds, speech, and singing.

Anatomy

The vocal folds are composed of a multi-layered structure. The outermost layer, the epithelium, is a thin, tough layer that provides protection. The intermediate and deep layers, collectively known as the lamina propria, are more flexible and allow for the necessary vibration to produce sound. The innermost layer, the vocalis muscle, provides the ability to change the shape and tension of the vocal folds.

Function

The primary function of the vocal folds is to produce sound. This is achieved through a process known as the Bernoulli effect, where the pressure drop caused by the rapid flow of air through the narrow gap between the vocal folds causes them to vibrate. This vibration produces sound waves, which are then modified by the resonance of the vocal tract to produce speech or singing.

Health and disorders

There are several health conditions and disorders that can affect the vocal folds, including laryngitis, vocal fold nodules, vocal fold polyps, and vocal fold paralysis. These conditions can cause symptoms such as hoarseness, voice changes, and difficulty speaking or swallowing.

See also

• Larynx
• Phonation
• Speech production
• Voice disorders

External links

• National Institute on Deafness and Other Communication Disorders: Voice

Vocal folds Resources
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