What does dysarthria primarily affect?

Dysarthria primarily affects the ability to articulate sounds due to a motor control issue involving the muscles responsible for speech. It is a speech disorder resulting from neurological injury or conditions that impair the ability to control the muscles used for speech production. This leads to slurred or slowed speech, making it difficult for individuals to pronounce words clearly, even though their understanding of language and cognitive abilities may remain intact. The disorder affects the physical process of speaking rather than the comprehension or reflective aspects of language. Thus, the correct answer focuses on this core aspect of dysarthria related to sound articulation.