True Vocal Folds

Term Category: Anatomy

Level 1

The True Vocal Folds, sometimes referred to by the antiquated term "vocal cords," are the source of sound for the vocal instrument. Situated in the throat, they co3me together and vibrate when air passes between them.

Level 2

The True Vocal Folds are the source of sound for the vocal instrument. Pitch and certain aspects of tonality are controlled by a complex balance of length, tension, mass, and air pressure.

Level 3

The True Vocal Folds are the source of sound in the vocal instrument. The vocal folds are closed (adducted), and air pressure builds below them (subglottal). When the air pressure reaches a certain threshold, the vocal folds are pushed apart, allowing air to pass between them. The vocal folds then come back together. The rate at which the vocal folds close determines the frequency that is produced.

Level 4

The True Vocal Folds are composed of multiple layers: the epithelium (the most superficial layer), the three layers of the lamina propria (superficial layer, intermediate layer, deep layer), and the thyroarytenoid muscle. This multilayer structure allows for the formation of the mucosal wave when the vocal folds vibrate. The mucosal wave involves the slippage of the epithelium and superficial lamina propria over the intermediate layer. When the thyroarytenoid muscle contracts, it increases the contact area between the vocal folds.

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