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Functional voice disorders, spasmodic dysphonia and voice therapy techniques
In functional voice disorders the folds are structurally normal and the problem is how they are used — too much tension (hyperfunction) or too little closure (hypofunction) — so the technique is chosen in the opposite direction: relax when there is too much, strengthen closure when there is too little.
Why it matters in the exam
Questions present a patient with muscle tension dysphonia (MTD), functional aphonia, mutational falsetto (puberphonia), ventricular phonation or spasmodic dysphonia, and ask what characterises it or which technique to use — and above all which technique not to use. A classic example: in hyperfunctional dysphonia or ventricular phonation pushing exercises are not used.
Other recurring points: in functional aphonia voice should be produced as early as possible, in the first session if possible; in mutational falsetto the patient's habitual pitch is higher than his optimal pitch even though the hormonal changes have happened; in adductor spasmodic dysphonia the voice is strained-strangled with breaks, botulinum toxin injection is the most effective treatment, and a trial of voice therapy helps diagnosis; and paradoxical vocal fold motion (PVFM) does not respond well to asthma medication.
Key points
- Functional = normal structure and wrong use; choose the technique opposite to the problem.
- MTD and ventricular phonation: relaxation; not pushing.
- Functional aphonia: voice as early as possible.
- Mutational falsetto: habitual pitch higher than optimal; lower the larynx.
- Spasmodic dysphonia: botulinum toxin; PVFM: breathing, not asthma medication.
Summary table
| Disorder | Features | What is done | What is avoided |
|---|---|---|---|
| Muscle tension dysphonia (MTD) | High, tense larynx on palpation, folds without oedema or lesion, sometimes low airflow | Relaxation, circumlaryngeal manual therapy, yawn-sigh, resonant voice | Pushing and effort |
| Functional aphonia | Whisper only, but a voiced cough | Produce voice as early as possible, from a cough or a non-speech sound; refer to other professionals as needed | Postponing voice production |
| Mutational falsetto (puberphonia) | A high voice in a boy who has gone through the hormonal changes; habitual pitch higher than optimal | Lower the larynx, find the low voice from a cough or throat clear, gentle pressure on the larynx | Hormone treatment when there is no hormonal problem |
| Ventricular phonation | Phonation with the false folds, a rough low voice | Relaxation, inhalation phonation, searching for true-fold voice | Pushing |
| Adductor spasmodic dysphonia | Strained-strangled voice with breaks, mainly on voiced sounds; a neurological disorder (dystonia) | Botulinum toxin injection; a trial of voice therapy to aid diagnosis | Expecting a cure from voice therapy alone |
| Paradoxical vocal fold motion (PVFM) | Shortness of breath and inspiratory stridor, sometimes taken for asthma | Breathing techniques that open the folds | Relying on asthma medication |
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Sources
- Stemple, Roy & Klaben, Clinical Voice Pathology: Theory and Management, 6th edition (2018) — Functional voice disorders and voice therapy
- Colton, Casper & Leonard, Understanding Voice Problems, 4th edition (2011) — Voice therapy approaches
- ASHA Practice Portal, 2024 — Voice Disorders
Sources are given for further reading; the text is written afresh and not copied from them.
Reviewed by the Examqo AI Professor · 2026-11-02. The text may contain errors; when in doubt, check the source.