Ventricular Phonation (Plica Ventricularis)
This occurs when a great amount of muscle tension above the vocal folds is created in the laryngeal area causing an approximation of the false vocal folds. In the extreme case, the ventricular (false) folds may actually be the source of vibration for voice production instead of the true vocal folds. The voice quality of ventricular phonation is typically a moderate to severe dysphonia characterized by low pitch, roughness, and strain. When true vocal fold vibration is physically possible, the ventricular phonation can benefit from treatment including counseling and vocal reeducation through direct voice therapy.