What speech feature often correlates with severe weakness in Flaccid Dysarthria?

• A. Harshness of voice
• B. Breathy phonation
• C. Fast speech
• D. Hypernasality

Answer: (B)

In Flaccid Dysarthria, a key characteristic is the presence of reduced muscle tone leading to weakness in the speech mechanism, which directly affects phonation. Breathy phonation is a common speech feature in individuals with severe weakness, as the subglottic pressure required for efficient phonation is compromised. This results in incomplete closure of the vocal folds during voiced speech, allowing excess airflow to escape, which manifests as a breathy quality.

Breathy phonation can also be attributed to weakness in the intrinsic laryngeal muscles, which play a crucial role in controlling vocal fold tension and closure. When these muscles are weakened, the ability to produce a clear, sustained voice diminishes, leading to the characteristic breathy sound. This is often most noticeable in speech tasks that require sustained phonation, where the lack of adequate vocal fold approximation becomes evident.

In contrast, other features such as harshness of voice, fast speech, and hypernasality do not specifically correlate with the primary symptom of severe weakness. Harshness may arise from increased tension or effort in phonation rather than weakness, fast speech is more often associated with other speech disorders, and hypernasality arises from velopharyngeal insufficiency, which is a different aspect