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[Masseter strength in patients with motor neuron disease]
Youichi Ohnuki1, Shunya Takizawa, Yukito Shinohara
1Department of Neurology, Tokai University School of Medicine.
Rinsho Shinkeigaku = Clinical Neurology
|March 1, 2003
Summary
Masseter muscle strength is generally preserved in individuals with motor neuron diseases, including amyotrophic lateral sclerosis (ALS). This study found no significant difference compared to healthy individuals, suggesting masseter strength is not particularly vulnerable.
Area of Science:
- Neurology
- Physiology
Context:
- Masseter muscles are crucial for mastication and digestion.
- Limited research exists on masseter muscle strength in motor neuron disease (MND) patients.
- MND affects nerve cells controlling voluntary muscles.
Purpose:
- To evaluate and compare masseter muscle strength in healthy volunteers and patients with motor neuron diseases.
- To determine if MND impacts occlusal force measurement.
Summary:
- Masseter strength was measured using occlusal force devices in 13 healthy volunteers and 16 MND patients.
- Mean masseter strength was 24.6 +/- 13.4 kg in healthy controls and 21.9 +/- 16.4 kg in MND patients (including ALS).
- No statistically significant difference was found, nor was there a correlation between masseter strength and clinical signs like bulbar palsy.
Impact:
- Masseter strength appears resilient in patients with motor neuron diseases.
- Findings suggest that masticatory function may not be a primary concern in early-stage MND.
- Further research could explore longitudinal changes in masseter strength during MND progression.