Rima vestibuli

Rima vestibuli is a part of the human larynx that is situated in the anterior (front) portion of the vocal folds. It is a space that is located between the vocal ligament and the vestibular fold, which are two important structures in the larynx. The rima vestibuli is wider than the rima glottidis, another space in the larynx, and it plays a crucial role in phonation (the production of speech sounds) and respiration (breathing).

Anatomy

The rima vestibuli is a part of the laryngeal inlet, which is the upper opening of the larynx. It is bounded by the vestibular folds, which are also known as the false vocal cords. These folds are covered by mucous membrane and contain a small amount of muscle fiber, but they do not participate in sound production. Instead, they help to protect the vocal cords and the rima glottidis, which is the space between the vocal cords.

The rima vestibuli is wider than the rima glottidis, and it is shaped like a V when viewed from above. The apex of the V points towards the back of the throat, and the open end of the V points towards the front of the throat. This shape allows air to flow smoothly into the larynx during respiration.

Function

The primary function of the rima vestibuli is to allow air to flow into and out of the larynx during respiration. It also plays a role in phonation, as the size and shape of the rima vestibuli can affect the quality of the voice. For example, if the rima vestibuli is narrowed or obstructed, it can cause hoarseness or other changes in the voice.

In addition to its roles in respiration and phonation, the rima vestibuli also helps to protect the vocal cords and the rima glottidis. The vestibular folds can close to cover the rima vestibuli, preventing foreign objects from entering the larynx and causing damage.

Clinical significance

Conditions that affect the rima vestibuli can cause a variety of symptoms, including changes in the voice, difficulty breathing, and pain in the throat. These conditions can include laryngitis, which is inflammation of the larynx; laryngeal cancer, which is a type of cancer that affects the larynx; and laryngeal papillomatosis, which is a rare condition that causes noncancerous growths to form in the larynx.

Treatment for these conditions can vary depending on the specific diagnosis and the severity of the symptoms. It may include medication, surgery, radiation therapy, or other forms of treatment.

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