How does AOS typically affect prosody compared with dysarthria?

• A. AOS often shows abnormal prosody with pauses or segmentation and uneven stress, whereas dysarthria may present with consistently reduced rate and monotone due to neuromuscular weakness.
• B. AOS produces uniformly slow speech with even stress patterns.
• C. AOS preserves prosody while dysarthria disrupts it.
• D. Prosody is not a distinguishing feature between AOS and dysarthria.

Answer: (D)

Prosody can be affected in both AOS and dysarthria, so it isn’t a reliable way to tell them apart. AOS stems from planning and programming difficulties, which can produce pauses within words, segmentation, and uneven stress as the speaker searches for the right sequence of movements. Dysarthria results from neuromuscular execution problems and, depending on the subtype, can cause a monotone pitch, reduced range of intonation, or a generally slower, less varied speech rate. These prosodic changes can occur in either disorder, so using prosody alone won’t consistently differentiate them. More definitive distinctions come from looking at articulation-error patterns—AOS tends to show inconsistent, distorted sequences and groping for sounds, whereas dysarthria shows more uniform weaknesses and rate changes tied to neuromuscular impairment.