Which of the following is NOT a symptom of ataxic dysarthria?

• A. Difficulty controlling range of motion
• B. Fluent speech
• C. Incoordination
• D. Decreased muscle tone

Answer: (B)

Fluent speech is indeed the correct choice in this context because ataxic dysarthria is characterized by specific speech production difficulties that stem from a lack of coordination and timing in the movements required for speech. Individuals with ataxic dysarthria often exhibit slurred or imprecise speech due to incoordination, which directly impacts articulation and the fluency of their speech.

Ataxic dysarthria is known for features such as irregular breathing patterns and a disordered rhythm and timing during speech. The symptoms include difficulty in controlling the range of motion of speech muscles, significant incoordination while producing speech sounds, and abnormal muscle tone variations, which can result in decreased muscle tone or fluctuations in tone. Consequently, fluent speech does not align with the hallmark features of this type of dysarthria, making it the best option that does not fit within the symptomatology of ataxic dysarthria.