Spasmodic Dysphonia

Spasmodic Dysphonia (SD)
Presentation by:Robin Bohot

Voice Disorders
Definition

* a central nervous system voice disorder caused by involuntary movements of one or more muscles of the larynx
* tight, strained or strangled voice quality

Causes of SD
* Damage to the Basal Ganglia
* Lack of any structural abnormality in the larynx
* Damage to the RLN?

Types of SD
* Adductor Spasmodic Dysphonia
* Mixed Spasmodic Dysphonia
* Variants-
http://www.youtube.com/watch?v=3m21wKQJwcU

Co-Occurring Disorders
* Blepharospasm (excessive eye blinking and involuntary forced eye closure)
* Tardive dyskinesia (involuntary and repetitious movement of muscles of the face, body, arms and legs)
* Oromandibular dystonia (involuntary movements of the jaw muscles, lips and tongue)
* Torticollis (involuntary movements of the neck muscles)
* Tremor (rhythmic, quivering muscle movements)

Treatments
Sources
* National Institute of Deafness and Other Communication Disorders
* http://www.dysphonia.org/
* http://www.asha.org/public/speech/disorders/SpasmodicDysphonia.htm

Spasmodic Dysphonia.ppt