[Classification of dysphonias based on the primary etiologic factor (part I)].
BACKGROUND
Phonation is a complex integral function of the organism. Regular phonation is characterized by: clarity and adequate pitch. Dysphonia is a disorder of phonation. It may have many acoustic forms, but hoarseness is the best known symptom of dysphonia. Acoustic phenomena are caused by: aperiodicity of vocal vibration, turbulent air flow in the glottis and incomplete glottis closure.
The best known classification of dysphonias was introduced by Perello. There are two groups: organic dysphonias and functional dysphonias. On the 8th Congress of Union of European Phoniatricians, in Koszeg (Hungary, 1979), Majdevac proposed a new classification.
We are proposing a new classification, made according to the primary etiologic factor in dysphonias. In this paper, we shall consider the first four.
This group includes: 1. Hyperkinetic dysphonia grade I 2. Hyperkinetic dysphonia grade II 3. Hypokinetic dysphonia 4. Contact hyperplastic dysphonia 5. Dysodic dysphonia II DYSPHONIAS CAUSED BY PRIMARY NEUROGENIC DISORDERS: This group includes: 1. Central dysphonias 2. Spasmodic (spastic) dysphonia 3. Dysphonia caused by myasthenia gravis 4. Dysphonia within skull base syndromes 5. Dysphonia caused by unilateral palsy of the inferior laryngeal nerve 6. Dysphonia caused by bilateral palsy of the inferior laryngeal nerve 7. Dysphonia caused by palsy of the superior laryngeal nerve III DYSPHONIAS CAUSED BY PRIMARY PSYCHOGENIC DISORDERS: This group includes: 1. Psychogenic aphonia 2. Psychogenic dysphonia 3. False mutation IV DYSPHONIAS CAUSED BY PRIMARY SOMATIC DISORDERS: This group includes: 1. Dysphonia caused by insufficiency of vocal cords 2. Dysphonia caused by oedema of vocal cords 3. Dysphonia caused by laryngitis (secondary functional) 4. Cord-ventricular voice 5. Posttraumatic dysphonia 6. Arthrogenic dysphonia 7. Presbyphonia


CONCLUSIONS
Dysphonia is a disorder of phonation which originates at the glottis level. When disorders of phonation are concerned it is necessary to study the organism as a whole as well as all mechanisms which take part in voice production. In that case the damaged part of the phonation system can be diagnosed, which enables efficient medical treatment of the disorder.
Majdevac
Z
Z
Klinika za bolesti uha, grla i nosa, Klinicki centar, Novi Sad.
Mitrović
S
S
Jović
R
R
D006801:Humans; D014832:Voice Disorders / Q000145:classification* / Q000209:etiology