Spasmodic dysphonia (SD) is a voice disorder. It occurs when the muscles of the throat freeze or go into spasms. Words are strangled and strained or they don’t get out at all. Sounds are also distorted.
Main types of SD include:
Often, the exact cause of SD is unknown. It is a disorder of the central nervous system. The areas of the brain that control these muscle movements are deep within the brain.
Factors that may increase your chance of developing SD include:
Symptoms of SD include:
You will be asked about your symptoms and medical history. A physical exam will be done.
Images may be taken of your bodily structures. This can be done with:
You may be referred to a team of specialists, including:
Talk with your doctor about the best treatment plan for you. Treatment options include the following:
American Speech-Language-Hearing Association
National Spasmodic Dysphonia Association
Ontario Association for Speech-Language Pathologists and Audiologists
Speech-Language & Audiology Canada
Daniilidou, P, Carding P, Wilson, J, Drinnan, M, Deary, V. Cognitive behavioral therapy for functional dysphonia. Annals of Otology, Rhinology & Laryngology. 2007;116:717-722.
Diagnosis. National Spasmodic Dysphonia Association website. Available at: http://www.dysphonia.org/diagnosis.php. Accessed February 17, 2014.
Rosow DE, Parikh P, et al. Considerations for initial dosing of botulinum toxin in treatment of adductor spasmodic dysphonia. Otolaryngol Head Neck Surg. 2013; 148(6):1003-6.
Spasmodic dysphonia. American Speech-Language-Hearing Association website. Available at: http://www.asha.org/public/speech/disorders/SpasmodicDysphonia.htm. Accessed February 17, 2014.
Spasmodic dysphonia. National Institute on Deafness and Other Communicative Disorders website. Available at: http://www.nidcd.nih.gov/health/voice/Pages/spasdysp.aspx. Updated October 2010. Accessed February 17, 2014.
Last reviewed February 2014 by Rimas Lukas, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.