Which of the following is not a general category of voice disorders?

The category labeled as "Nonfunctional" is not recognized as a general classification of voice disorders. Voice disorders typically fall into three established categories: functional, neurological, and structural.

Functional voice disorders are related to improper or inefficient use of the vocal mechanism, often due to habits or emotional influences rather than structural or neurological issues. Neurological voice disorders arise from conditions that affect the nervous system and can impair the control of the laryngeal muscles. Structural voice disorders involve physical abnormalities or changes in the larynx, such as polyps or nodules, that affect voice production.

The term "Nonfunctional" does not align with established categories in the field of voice disorders and thus does not represent a recognized type of voice disorder within the framework of clinical assessment and diagnosis. By understanding these three valid categories, it becomes clear why "Nonfunctional" is not considered a proper classification.