In UUMN dysarthria, what is typically observed in the phonation quality?

• A. Mild to moderate harshness
• B. Breathy voice
• C. Strained-strangled voice
• D. Bubbles voice quality

Answer: (A)

In UUMN (Unilateral Upper Motor Neuron) dysarthria, the phonation quality is typically characterized by mild to moderate harshness. This is a result of weakness and increased tone in the vocal fold musculature, leading to an uneven or disrupted breathing pattern during speech. The harshness can occur because the vocal folds may not close completely or may have an irregular vibratory pattern, resulting in turbulent airflow.

This phonatory characteristic arises from the effects of unilateral damage to the upper motor neurons, which primarily affects one side of the vocal mechanism, making it difficult to regulate the fine motor control required for clear and smooth vocal production. The combination of this weakness and the potential for spasticity contributes to the distinct quality of voice that is observed in individuals with UUMN dysarthria.

Other voice qualities listed are less characteristic of UUMN dysarthria; for example, a breathy voice would suggest incomplete closure of the vocal folds, which is more common in flaccid dysarthria. A strained-strangled voice typically indicates severe spasticity affecting vocal fold tension and closure, and the term "bubbles voice quality" does not correspond to a recognized phonatory characteristic in dysarthrias. Therefore, the correct identification