What aspect of speech is affected by clonus in spastic dysarthria?

• A. Pitch variation
• B. Fluidity of speech
• C. Volume control
• D. Speech speed

Answer: (B)

In spastic dysarthria, clonus is characterized by involuntary muscle contractions and a lack of appropriate muscle relaxation, which impacts the coordination and smoothness of motor tasks. This neuromuscular disruption leads to a reduction in the overall fluidity of speech. The erratic muscle contractions can create interruptions in the flow of speech, causing a staccato or jerky quality that makes it difficult for an individual to speak smoothly.

Furthermore, while pitch variation, volume control, and speech speed may also be influenced by spastic dysarthria, it is the fluidity of speech that is most directly impacted by clonus. The repetitive and involuntary nature of clonus results in a disjointed speaking pattern, making it challenging for the speaker to maintain a continuous and coherent speech flow.