Spasmodic dysphonia: Difference between revisions

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Spasmodic Dysphonia

Animation of vocal fold movement

Spasmodic dysphonia is a chronic voice disorder characterized by involuntary spasms of the laryngeal muscles, which cause interruptions in speech and affect the voice quality. It is a type of dystonia, a neurological movement disorder.

Types

Spasmodic dysphonia is classified into three main types based on the muscles affected:

Adductor Spasmodic Dysphonia

This is the most common form, where the muscles that bring the vocal folds together (adductors) spasm, causing the voice to sound strained or strangled.

Abductor Spasmodic Dysphonia

In this less common form, the muscles that separate the vocal folds (abductors) spasm, resulting in a breathy or whispery voice.

Mixed Spasmodic Dysphonia

This rare form involves both adductor and abductor spasms, leading to a combination of voice symptoms.

Symptoms

The primary symptom of spasmodic dysphonia is a voice that is interrupted by involuntary muscle movements. This can manifest as:

Strained or strangled voice
Breathy or whispery voice
Intermittent breaks in speech
Tremor in the voice

Causes

The exact cause of spasmodic dysphonia is unknown, but it is believed to involve abnormal functioning in the basal ganglia, a part of the brain that helps control movement. It may have a genetic component and can be triggered by stress or upper respiratory infections.

Diagnosis

Diagnosis of spasmodic dysphonia is typically made by a team of specialists, including an otolaryngologist, a neurologist, and a speech-language pathologist. The evaluation may include:

Laryngoscopy to visualize the vocal folds
Voice analysis
Neurological examination

Treatment

There is no cure for spasmodic dysphonia, but several treatments can help manage the symptoms:

Botulinum Toxin Injections

Botulinum toxin injections into the affected muscles are the most common treatment, providing temporary relief by weakening the muscles and reducing spasms.

Voice Therapy

Voice therapy with a speech-language pathologist can help patients develop strategies to improve voice control and reduce strain.

Surgery

In some cases, surgical interventions such as selective laryngeal denervation-reinnervation may be considered.

Prognosis

Spasmodic dysphonia is a chronic condition that can significantly impact quality of life. While treatments can help manage symptoms, ongoing therapy is often necessary.

Related pages

@@ Line 1: / Line 1: @@
-'''Spasmodic dysphonia''' (SD), also known as '''laryngeal dystonia''', is a [[neurological disorder]] affecting the [[voice box]] or [[larynx]]. This condition is characterized by involuntary movements or spasms of the muscles in the larynx during speech.
+{{DISPLAYTITLE:Spasmodic Dysphonia}}
-==Overview==
+== Spasmodic Dysphonia ==
-Spasmodic dysphonia is a type of [[dystonia]], a group of neurological disorders that cause muscle spasms and contractions. In spasmodic dysphonia, the spasms affect the muscles that control the vocal cords, causing the voice to break or have a tight, strained, or strangled quality.
+[[File:Vocal_fold_animated.gif|thumb|right|Animation of vocal fold movement]]
+'''Spasmodic dysphonia''' is a chronic voice disorder characterized by involuntary spasms of the [[larynx|laryngeal]] muscles, which cause interruptions in speech and affect the voice quality. It is a type of [[dystonia]], a neurological movement disorder.
-==Symptoms==
+== Types ==
-The primary symptom of spasmodic dysphonia is voice changes. These changes can include a shaky, hoarse, or groaning voice, and difficulty with speech. The severity of the symptoms can vary from person to person and can be influenced by factors such as stress or fatigue.
+Spasmodic dysphonia is classified into three main types based on the muscles affected:
-==Causes==
+=== Adductor Spasmodic Dysphonia ===
-The exact cause of spasmodic dysphonia is unknown. However, it is believed to be related to abnormal functioning of the [[basal ganglia]], a part of the brain that controls movement. Some researchers believe that spasmodic dysphonia may be linked to genetic factors, as some people with the condition have relatives with similar voice problems or other types of dystonia.
+This is the most common form, where the muscles that bring the vocal folds together (adductors) spasm, causing the voice to sound strained or strangled.
-==Diagnosis==
+=== Abductor Spasmodic Dysphonia ===
-Diagnosis of spasmodic dysphonia is typically based on a person's medical history and a physical examination, including a detailed examination of the voice and larynx. Other tests, such as [[electromyography]] (EMG), may be used to measure the electrical activity of the muscles in the larynx.
+In this less common form, the muscles that separate the vocal folds (abductors) spasm, resulting in a breathy or whispery voice.
-==Treatment==
+=== Mixed Spasmodic Dysphonia ===
-While there is no cure for spasmodic dysphonia, treatments are available to help manage the symptoms. These can include voice therapy, medications, and in some cases, surgery. One of the most effective treatments is injections of [[botulinum toxin]] (Botox) into the affected muscles of the larynx.
+This rare form involves both adductor and abductor spasms, leading to a combination of voice symptoms.
-==See also==
+== Symptoms ==
+The primary symptom of spasmodic dysphonia is a voice that is interrupted by involuntary muscle movements. This can manifest as:
+* Strained or strangled voice
+* Breathy or whispery voice
+* Intermittent breaks in speech
+* Tremor in the voice
+== Causes ==
+The exact cause of spasmodic dysphonia is unknown, but it is believed to involve abnormal functioning in the [[basal ganglia]], a part of the brain that helps control movement. It may have a genetic component and can be triggered by stress or upper respiratory infections.
+== Diagnosis ==
+Diagnosis of spasmodic dysphonia is typically made by a team of specialists, including an [[otolaryngologist]], a [[neurologist]], and a speech-language pathologist. The evaluation may include:
+* Laryngoscopy to visualize the vocal folds
+* Voice analysis
+* Neurological examination
+== Treatment ==
+There is no cure for spasmodic dysphonia, but several treatments can help manage the symptoms:
+=== Botulinum Toxin Injections ===
+[[Botulinum toxin]] injections into the affected muscles are the most common treatment, providing temporary relief by weakening the muscles and reducing spasms.
+=== Voice Therapy ===
+[[Voice therapy]] with a speech-language pathologist can help patients develop strategies to improve voice control and reduce strain.
+=== Surgery ===
+In some cases, surgical interventions such as selective laryngeal denervation-reinnervation may be considered.
+== Prognosis ==
+Spasmodic dysphonia is a chronic condition that can significantly impact quality of life. While treatments can help manage symptoms, ongoing therapy is often necessary.
+== Related pages ==
 * [[Dystonia]]
-* [[Neurological disorder]]
+* [[Larynx]]
 * [[Voice therapy]]
+[[Category:Voice disorders]]
 [[Category:Neurological disorders]]
-[[Category:Voice disorders]]
-{{neurology-stub}}