Dysarthria, a neuromuscular speech disorder, can be the first and most prominent manifestation of PD.
Alongside changes in speech, PD is associated with impaired morphosyntactic, lexical-semantic, and high-level language comprehension and production.
Pharmaceutical and surgical interventions for PD may improve certain modalities of speech production, but effects vary between individuals.
Longitudinal research designs are needed to evaluate the complex interplay between motor speech, language, and cognition.
Speech acoustics may serve as a valuable proxy marker of PD ‘risk’, disease progression and treatment efficacy.