Oromandibular Dystonia: Clinical and Demographic Data from Eight-Two Patients

Area of Science:

• Neurology
• Movement Disorders
• Focal Dystonia

Background:

• Dystonia involves involuntary muscle contractions causing abnormal postures.
• Oromandibular dystonia (OMD) is a rare focal dystonia impacting the tongue, jaw, and mouth.
• OMD is often misdiagnosed as psychogenic, leading to delayed diagnosis and treatment.

Purpose of the Study:

• To determine the demographic and clinical characteristics of patients with oromandibular dystonia (OMD).

Main Methods:

• Retrospective analysis of 82 patients with isolated or combined OMD from 2004-2021.
• Data collected included age, sex, age at onset, disease duration, OMD type, affected muscles, and treatment.
• Etiologies and presence of family history or sensory tricks were also noted.

Main Results:

• 82 patients (44 female, 38 male) were included; 39 had isolated OMD, 43 had segmental/generalized dystonia.
• Average disease duration was 6.01 years, average age at onset was 43.34 years; etiology was idiopathic in most.
• Jaw-opening dystonia was the most common type; 15 patients had task-specific dystonia.

Conclusions:

• OMD is a focal dystonia significantly impacting quality of life.
• This study provides valuable data on the clinical features of OMD.
• It emphasizes the need to raise awareness for this often-neglected disorder.