Primary muscle tension dysphonia is defined as which of the following?

• A. It occurs without other structural or neurological pathology.
• B. It arises as a compensatory behavior to coexisting laryngeal pathology.
• C. It is a degenerative neural disease.
• D. It is caused by inflammatory laryngeal infection.

Answer: (A)

Primary muscle tension dysphonia is a functional voice disorder where the voice is abnormal due to excessive laryngeal muscle tension, but there is no structural or neurological disease identified in the larynx. In other words, the vocal anatomy and nerve supply appear normal, and the dysphonia stems from maladaptive voice use and increased tension—often related to stress, habits, or psychosocial factors. Because there’s no organic pathology, exam findings are typically normal aside from the altered voice, distinguishing it from cases where a structural lesion, nodules, inflammatory processes, or neurological conditions are present. The other scenarios describe dysphonia that arises as a response to an underlying pathology (secondary MTD) or from an organic disease, which is why they don’t define the primary form.