Ääniväylät

Ääniväylät, also known as vocal cords or vocal folds, are two folds of mucous membrane located in the larynx, the voice box. They play a crucial role in phonation, the process of producing sound. When air passes through the larynx, it causes the vocal cords to vibrate, producing the sound that we perceive as our voice. The tension and position of the vocal cords can be adjusted to produce different pitches and volumes of sound.

The vocal cords are innervated by the recurrent laryngeal nerve, which allows for precise control over their movement. This control is essential for speech, singing, and other vocal activities. The vocal cords are also covered in a thin layer of epithelium, which helps to protect them from damage and infection.

There are two main types of vocal cords: true vocal cords and false vocal cords. True vocal cords are the primary vocal cords that are responsible for producing sound. False vocal cords, also known as ventricular folds, are located above the true vocal cords and are involved in the production of certain sounds, such as the "h" sound.

The vocal cords can be affected by a variety of conditions, including vocal cord nodules, polyps, and cysts. These conditions can cause hoarseness, difficulty speaking, and other symptoms. Treatment options for vocal cord conditions may include voice therapy, medication, or surgery.

In summary, ääniväylät are essential for the production of sound and are controlled by the recurrent laryngeal nerve. They can be affected by various conditions and may require treatment.