[Diagnosis of non-organic dysphonia in adult]

Non organic dysphonia or functional voice disorders are the consequence of a vocal misuse or overuse with inefficient oral communication. Any stage of voice production can be altered. A review of physiopathological, aerodynamic and biomechanical mechanisms will help to understand the onset of dysphonia. Organic lesions as a consequence of functional voice disorders are frequent but the link is not easy to establish. It is important to look for various physiologic, anatomic, environmental, behavioural and infectious factors that could induce or aggravate non organic dysphonia, as they can benefit from specific treatment. A thorough functional and organic assessment is the first step of the rehabilitation process, taking into account the patient's expectations about his voice handicap.