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The central aim of this experiment was to provide an integrative description of basic kinematic parameters of speech movements and to determine the effects of increased linguistic demands on coordination of interarticulator trajectories in individuals with Parkinson’s disease (PD). It has long been recognized that people with PD suffer from dysarthria resulting from lesions of the basal ganglia complex. Earlier studies of speech production in PD using perceptual, acoustic, or kinematic analyses have yielded mixed findings regarding the characteristics of articulatory movements underlying the speech disorder, in some cases reporting reduced articulatory output and in other instances revealing normal orofacial movement parameters for speech. Recent investigations of cognitive and language processes in individuals with PD implicate basal ganglia involvement in non-motor communicative behaviors as well. These …