“…It can occur as a primary condition without organic changes to the vocal folds or as a secondary, compensatory condition to underlying organic or neurological laryngeal pathology. The aetiology of MTVD can be multifactorial and includes phonotrauma, excessive vocal load, glottic incompetence (vocal fold paresis and atrophy), psychological stress, and cooccurring medical conditions such as upper respiratory tract infection, laryngopharyngeal reflux, and sinusitis with post-nasal drip [2,3]. Within the voice-disordered population, functional dysphonia has documented prevalence rates of between 20.5 to 41%, while the prevalence of phonotraumatic lesions (e.g., vocal nodules and polyps) is 12-15% [4,5].…”