Dysarthria arises from impairment in what domain?

Dysarthria arises from impairment in what domain?

• A. Muscle spasticity or paresis causing speech difficulty
• B. Visual impairment
• C. Language comprehension deficit
• D. Damage to auditory cortex

Answer: (A)

Dysarthria is a motor speech disorder: it stems from impairment in the execution of the muscles used to speak, not from how we understand language or hear sounds. When the speech muscles (such as the lips, tongue, vocal cords, and diaphragm) are weak, stiff, or poorly coordinated, articulation, voice quality, and prosody become slurred or slowed. That’s why the domain involved is the motor control of speech muscles and their neuromuscular execution. The other options point to non-motor issues—visual processing, language comprehension, or auditory perception—none of which directly cause the production problems seen in dysarthria.

Dysarthria is a motor speech disorder: it stems from impairment in the execution of the muscles used to speak, not from how we understand language or hear sounds. When the speech muscles (such as the lips, tongue, vocal cords, and diaphragm) are weak, stiff, or poorly coordinated, articulation, voice quality, and prosody become slurred or slowed. That’s why the domain involved is the motor control of speech muscles and their neuromuscular execution. The other options point to non-motor issues—visual processing, language comprehension, or auditory perception—none of which directly cause the production problems seen in dysarthria.