Which set of conditions are listed as causes of dysarthria?

Which set of conditions are listed as causes of dysarthria?

• A. Parkinson's disease and stroke
• B. ALS, brain injury, CT, Huntington's disease
• C. Hearing loss
• D. Diabetes and obesity

Answer: (B)

Dysarthria happens when the nerves and muscles that control speech are damaged, so the best diagnostic cues are conditions that directly affect motor control of the speech apparatus. ALS directly damages motor neurons that innervate the lips, tongue, palate, and vocal folds, producing weakness and imprecise articulation. Brain injury disrupts the neural pathways and coordination needed for breathing, phonation, and articulation, leading to slurred or garbled speech. Huntington's disease causes abnormal movements and impaired motor planning, which interfere with precise and coordinated speech. If CT here refers to a brain-injury-related condition, that also fits as a cause. By contrast, hearing loss affects how we perceive sound rather than how we move the speech muscles, and diabetes or obesity don’t directly impair the neuromuscular speech system; Parkinson's disease and stroke can cause dysarthria, but the set that emphasizes direct neuromuscular and brain-injury causes is the most representative.

Dysarthria happens when the nerves and muscles that control speech are damaged, so the best diagnostic cues are conditions that directly affect motor control of the speech apparatus. ALS directly damages motor neurons that innervate the lips, tongue, palate, and vocal folds, producing weakness and imprecise articulation. Brain injury disrupts the neural pathways and coordination needed for breathing, phonation, and articulation, leading to slurred or garbled speech. Huntington's disease causes abnormal movements and impaired motor planning, which interfere with precise and coordinated speech. If CT here refers to a brain-injury-related condition, that also fits as a cause. By contrast, hearing loss affects how we perceive sound rather than how we move the speech muscles, and diabetes or obesity don’t directly impair the neuromuscular speech system; Parkinson's disease and stroke can cause dysarthria, but the set that emphasizes direct neuromuscular and brain-injury causes is the most representative.