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RESEARCH PRODUCT

A specific picture of speech disturbances in Polish speaking patients with mixed dysarthria in multiple sclerosis (MS) and in Wilson's disease (WD)

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The aim of this paper is to compare a specific picture of speech disturbances in Polish-speaking patients with mixed dysarthria in multiple sclerosis (MS), and in Wilson’s disease (WD). We selected for the experiment 20 persons with dysarthria of different origin: 10 persons with dysarthria in multiple sclerosis (MS), and 10 persons with dysarthria in Wilson’s disease (WD). The compared groups were similar in age and the severity of the dysarthria. Patients read 11 words containing selected Polish sounds distinguished according to the manner of articulation. The results were qualitatively and quantitatively analyzed (using a non-parametric Mann-Whitney U test). The picture of speech production disturbances in Polish-speaking patients with mixed dysarthria in multiple sclerosis (MS), and in Wilson’s disease (WD) includes: (1) the interpenetration of motor and linguistic problems, (2) variability in sound production, (3) the relationship between cognitive, emotional and motor speech functions, (4) production disturbances concerning one or more articulatory features of sounds. However, we found significantly more disturbances in the production of fricative sounds in the group with WD than in the group with MS. The specific picture of speech production disturbances in Polish- speaking patients with mixed dysarthria of different origin is related to the etiology and pathomechanism of dysarthria. There is significantly more disturbances in the production of fricative sounds in the group with multiple sclerosis (MS), than in the group with Wilson’s disease (WD).