lower motor neurone dysarthria

Last reviewed 12/2022

In this type of dysarthria there is failure of articulation due to muscular weakness resulting from:

• lesions of the brainstem nuclei or cranial nerves numbered VII, IX, X or XII
• progressive bulbar palsy
• Guillan-Barre
• myasthenia gravis
• poliomyelitis
• diphtheria

There is often wasting and fasciculation of the tongue. Palatal and lip movements may be impaired. There may be an associated problem with phonation.