ABSTRACT
This chapter outlines the vocal fold movement patterns or organic changes corresponding to the Voice Disorder classification. Where there is an organic disorder, the impairment to voice involves a lesion of the phonatory system, which may be congenital, inflammatory, traumatic, neoplastic or neurological. Detail is provided of the vocal symptoms, the appearance of the vocal folds at the free fold edge, the expected vibration patterns in the mucosal wave, a description of the typical dysphonia produced and the options for therapy. PGC (Posterior Glottic Chink) may occur in those who report no voice disorder but who have relatively 'gentle' and somewhat breathy voice. The term ventricular phonation is described by Maryn and Bodt as referring to 'pathological interference of the false folds during phonation'. When the vocal folds and/or supraglottic area exhibit hypertonicity and hyperadduction, the voice is squeezed, effortful and easily fatigued.
