Non-motor symptoms in spasmodic dysphonia: A case control-study

Area of Science:

• Neurology
• Otolaryngology
• Psychiatry

Background:

• Non-motor symptoms (NMS) are increasingly recognized in focal adult-onset dystonias.
• Spasmodic dysphonia (SD) is a focal dystonia impacting laryngeal muscle control.

Purpose of the Study:

• To investigate the prevalence and spectrum of NMS in patients diagnosed with spasmodic dysphonia (SD).
• To compare NMS burden between SD patients and age/sex-matched healthy controls.

Main Methods:

• Evaluated 17 SD patients and 17 controls for NMS.
• Utilized validated scales for voice handicap (VHI-10), reflux symptoms, neuropsychiatric status, and quality of life (QoL).

Main Results:

• SD patients reported significantly higher rates of depressive symptoms, insomnia, smell/taste loss, throat pain, and swallowing difficulties compared to controls.
• No significant correlation was found between voice handicap (VHI-10), NMS count, or QoL in the SD group.

Conclusions:

• Spasmodic dysphonia is associated with a higher burden of specific non-motor symptoms, including depressive, sleep-related, and sensory disturbances.
• These findings suggest a systemic component or shared pathophysiology in SD impacting multiple neurological domains.