Spasmodic dysphonia is a neurologically based vocal disorder involving intermittent spasms in muscles of the layrnx (voice box). The spasms may produce interruptions in speech or lend a whispery or strained quality to the voice.
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- The Voice Doctor Alternative therapy for voice disorders based on a psychological interpretation of the condition.
- Neurological Concomitants in Spasmodic Dysphonia Review of neurological conditions that may accompany Spasmodic Dysphonia, with background information on the differential diagnosis and treatment of SD. Authored by Lyn Dee Harrelson of New Mexico State University's Communication Disorders Program.
- NORD: Spasmodic Dysphonia Abstracted version of a report from National Organization for Rare Disorders database. Features include a general description of SD, listings for support organizations, a link to information on the Botox assistance program administered by NORD, and an opportunity to purchase the full-text report.
- Dextromethorphan to Treat Patients with Voice Spasms A Maryland-based clinical study comparing the effects of dextromethorphan, lorazepam, and placebo in individuals with spasmodic dysphonia, muscular tension dysphonia, or vocal tremor. Background and participation details are offered by the National Library of Medicine's ClinicalTrials.gov site.
- New York Eye & Ear Infirmary: Spasmodic Dysphonia Fact sheets dedicated to SD and its treatment, accompanied by pointers to research reports and information concerning a related clinical trial that is being conducted at the Infirmary.
- Dystonia Ireland: Spasmodic Dysphonia A primer on SD, presented by Dystonia Ireland -- a Dublin- based charity supporting patients and families affected by forms of dystonia.
- Spasmodic Dysphonia Bulletin Board Moderated forum for SD patients and their families. Provided by the National Spasmodic Dysphonia Association.
- National Spasmodic Dysphonia Association Resources for patients and professionals, including multimedia demonstrations of SD, descriptions of available therapies, information on a financial-assistance program for patients who require Botox, and listings for dystonia specialists, support groups, and upcoming events.
- ASHA: Spasmodic Dysphonia A consumer-oriented SD primer, focusing on the characteristics, diagnosis, and treatment of the condition. Published by the American Speech-Language-Hearing Association.
- Vanderbilt Bill Wilkerson Center: Spasmodic Dysphonia Overview describing the three types of SD. Includes a video of Linda's story.
- eMedicine - Spasmodic Dysphonia Peer-reviewed article on the medical and surgical management of SD, co-authored by Darius Bliznikas, MD and Soly Baredes, MD.