Spasmodic dysphonia is a neurological voice disorder in which involuntary movements of the voice box disrupt speech. The voice may sound strained, effortful, breathy, or intermittently interrupted. Because voice symptoms have many causes, diagnosis usually requires specialist assessment rather than relying on how the voice sounds in a short recording.
How symptoms can appear
Some people have breaks or a squeezed quality during voiced sounds, while others experience breathy breaks. Symptoms may vary by speaking situation and can be less obvious during whispering, laughing, or singing. The disorder can affect confidence and social participation even when the person is otherwise healthy.
How diagnosis is made
An ENT clinician or voice specialist reviews symptom onset, voice use, medical history, and other neurological features. Laryngeal examination is commonly needed to inspect vocal-fold movement and exclude structural lesions or paralysis. A speech-language pathologist with voice expertise may contribute to assessment and treatment planning.
Treatment and support
Treatment may include injections of botulinum toxin into selected laryngeal muscles, voice therapy to address compensatory strain, and communication strategies. Benefits and duration vary, and repeated treatment may be needed. The plan should be individualised, with discussion of temporary breathiness or swallowing effects that can occur after injections.
Frequently asked questions
Is spasmodic dysphonia the same as ordinary vocal strain? No. It is a neurological voice disorder, although muscle tension and strain can coexist.
Can voice therapy cure it? Voice therapy may improve function and reduce compensatory tension, but it does not replace specialist evaluation of the underlying disorder.
Is laryngoscopy needed? Usually a specialist needs to examine the voice box to distinguish spasmodic dysphonia from other causes of voice change.
Related reading
- Persistent Hoarseness: Causes and When to See an ENT Specialist
- Voice Therapy: Who May Benefit and What Sessions Involve