Early Signs of Bulbar Disease in ALS May Be Evident in Tongue’s Movement While Talking

Researchers report that evaluating a person’s control of tongue movement during speech can help to diagnose bulbar disease, especially in its early stages, in patients with amyotrophic lateral sclerosis (ALS).

ALS affects motor neurons in the brain, brainstem, and spinal cord. If patients show alterations in speech or swallowing abilities they are diagnosed with bulbar ALS. Indeed, as ALS disease progresses, 85 percent of patients exhibit bulbar disease.

The study, “Speech Movement Measures as Markers of Bulbar Disease in Amyotrophic Lateral Sclerosis,” published in the Journal of Speech, Language, and Hearing Research, aimed to determine if the mechanics of speech, as seen in tongue and jaw control, could be used as diagnostic markers for bulbar disease in ALS.

The standard clinical assessment of bulbar disease can be done by examination of the strength, range, speed of movement, and symmetry of oral musculature. However, these measurements can be subjective.

The authors proposed that mechanistic measurements of the tongue and jaw could allow the evaluation of independent structures involved in speech. This process could improve the assessment of a motor speech disorder resulting from ALS.

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