What best describes the phonation quality in individuals with Hypokinetic Dysarthria?

In individuals with hypokinetic dysarthria, the phonation quality is best described as consistently breathy or harsh due to the reduction in the range and amplitude of movement, specifically involving the vocal folds. This form of dysarthria is often associated with conditions such as Parkinson's disease, where individuals may exhibit difficulties in initiating and maintaining vocal fold closure, leading to a breathy voice quality. The harsh phonation can also stem from incomplete closure of the vocal folds, which can create a tense, strained voice. This results in a sound that may be quieter or softer than normal, contributing to the overall impression of breathiness in their speech.

Other qualities mentioned do not align with the typical characteristics of hypokinetic dysarthria, which emphasizes the decrease in vocal intensity and the consistent presence of breathiness or harshness in the voice.