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The 'true vocal cords' are distinguished from the 'false vocal folds', known as vestibular folds or ventricular folds, which sit slightly superior to the more delicate true folds. These have a minimal role in normal phonation , but can produce deep sonorous tones, screams and growls.
The glottis is defined as the true vocal folds and the space between them. It is composed of an intermembranous portion or anterior glottis, and an intercartilaginous portion or posterior glottis. The border between the anterior and posterior glottises is defined by an imaginary line drawn across the vocal fold at the tip of the vocal process ...
The vestibular folds are not responsible for sound production, but rather for resonance. The exceptions to this are found in Tibetan chanting and Kargyraa, a style of Tuvan throat singing. Both make use of the vestibular folds to create an undertone. These false vocal cords do not contain muscle, while the true vocal cords do have skeletal muscle.
The lungs, the "pump" must produce adequate airflow and air pressure to vibrate vocal folds. The vocal folds (vocal cords) then vibrate to use airflow from the lungs to create audible pulses that form the laryngeal sound source. [1] The muscles of the larynx adjust the length and tension of the vocal folds to 'fine-tune' pitch and tone.
The rima glottidis is the narrowest part of larynx. It is longer (~23 mm) in males than in females (17–18 mm). [1]The rima glottidis is an aperture between the two true vocal cords anteriorly, and the bases and vocal process of the two arytenoid cartilages posteriorly.
True Vocal Folds: Body-Cover Control: The 'body-cover theory' of vocal fold structure was introduced by Hirano in 1977. [38] This figure demonstrates the controlled use of the vocal folds in four body-cover configurations: on the thick edge, on the thin edge, in a stiff mode, or in a slack mode.
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 ...
Reinke's edema is characterized by a "sac-like" appearance of the vocal folds. [6] The edema is a white translucent fluid that causes a bulging ( distension ) of the vocal cord. [ 2 ] [ 14 ] The most common clinical symptom associated with Reinke's edema is an abnormally low pitched voice with hoarseness.