Johns Hopkins Center for Laryngeal and Voice Disorders: Spasmodic Dysphonia
- Symptoms and treatment of spasmodic dysphonia, enhanced by Quicktime movies of vocal cords before and after Botox therapy for adductor SD.
- http://www.hopkinsmedicine.org/voice/disorders.html#spasmodic

UNC Spasmodic Dysphonia/Botox Clinic
- Information concerning the diagnosis and treatment of spasmodic dysphonia at the University of North Carolina's specialized clinic.
- http://neptune.med.unc.edu/ent/oto-hns/clinical_voice_spasmodic_dysphonia.html

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
- http://www.dysphonia.org/

Spasmodic Dysphonia Bulletin Board
- Moderated forum for SD patients and their families. Provided by the Dystonia Medical Research Foundation.
- http://www.dysphonia-bb.org/forums/sd/

Spasmodic Dysphonia
- From the Baylor Grand Rounds Archive, a review of SD diagnosis and treatment, featuring historical perspectives and a case presentation.
- http://www.bcm.edu/oto/grand/110499.html

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.
- http://www.dystonia.ie/page.asp?Page=46&Menu=33

Spasmodic Dysphonia Support on the Internet
- Offering a supportive e-mail list and directory of Web-based resources for individuals affected by SD.
- http://www.spasmodic-dysphonia-support.org/

Voiceproblem.org: Spasmodic Dysphonia
- Five-page guide to SD, authored by specialists in the treatment of vocal disorders. Fundamental SD concepts are introduced and details concerning symptoms, diagnosis and treatment are provided.
- http://www.voiceproblem.org/disorders/spasmodicdysphonia/index.asp

University of Michigan Study: Botox Shots Ease Voice Problems
- Report on a recently published Botox study, which focused on the long-term effects of the medication in individuals with adductor SD. Pointers to further information about SD and its treatment at the U-M Health System's Vocal Health Center are provided, i
- http://www.med.umich.edu/opm/newspage/2004/botox.htm

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.
- http://www.nyee.edu/cfv-neuro.html#sd

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 Librar
- http://www.clinicaltrials.gov/ct/show/NCT00055549

Vanderbilt Bill Wilkerson Center: Spasmodic Dysphonia
- Overview describing the two main forms of SD and a third, compensatory form, "chronically tight," which is recognized by the Nashville-based treatment center. Links to specific treatment information and details about the center are also provided
- http://www.vanderbiltbillwilkersoncenter.com/voicecenter.html

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 opp
- http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Spasmodic%20Dysphonia

eMedicine - Spasmodic Dysphonia
- Peer-reviewed article on the medical and surgical management of SD, co-authored by Darius Bliznikas, MD and Soly Baredes, MD.
- http://www.emedicine.com/ent/topic349.htm

NIDCD Health Information: Spasmodic Dysphonia
- Answers to frequently asked SD questions, offered by the National Institute on Deafness and Other Communication Disorders (a division of the National Institutes of Health).
- http://www.nidcd.nih.gov/health/voice/spasdysp.asp

Spasmodic Dysphonia : A New Surgical Treatment
- Case report describing Dr. Nobuhiko Isshiki's Midline Type 2 Thyroplasty technique for SD.
- http://web.kyoto-inet.or.jp/people/isshiki/spasmodic-dysphonia.html

VoiceDoctor.net: Spasmodic Dysphonia
- Fact sheet on abductor and adductor SD, with links to audio clips, diagnostic information, reviews of medical and surgical approaches, and national listings for laryngologists. Presented by James P. Thomas, MD.
- http://www.voicedoctor.net/therapy/dystonia.html

I Have Spasmodic Dysphonia
- Lani Estepa's personal story, accompanied by links to SD support organizations.
- http://www.tintota.com/support/sd.htm

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.
- http://web.nmsu.edu/~lleeper/pages/Voice/harrelson/index.htm

PMDI
- Information concerning SD treatment and support-group meetings at the Parkinson's and Movement Disorders Institute of Orange County, California.
- http://www.pmdi.org/

Voice Doctor
- California-based practice specializing in "Direct Voice Rehabilitation" as an alternative approach to SD.
- http://www.voice-doctor.com/