John Van Borsel

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In this report, we have analyzed the effects of left and right STN stimulation separately on different aspects of speech. Significant differences were found between left and right stimulation. It appears that selective left-sided stimulation has a profoundly negative effect on prosody, articulation and hence intelligibility. Right-sided stimulation does not(More)
To investigate the hypothesis that in multilingual speakers different languages are represented in distinct brain regions, 12 multilingual right-handed men performed a word fluency task, a picture naming task, a comprehension reading task, and their respective control tasks in three languages (Dutch, French, and English) while whole-head functional magnetic(More)
The purpose of this investigation was to explore the feasibility of fMRI in the study of developmental stuttering. Speech contrasts (loud versus silent reading) and language contrasts (reading of semantically meaningful text versus nonsense words) of six developmental stutterers and six nonstutterers were compared using a commercial 1 Tesla MR-Scanner(More)
PURPOSE To investigate the effect of repeated exposure to delayed auditory feedback (DAF) during a 3-month period outside a clinical environment and with only minimal clinical guidance on speech fluency in people who stutter. METHOD A pretest-post-test design was used with repeated exposure to DAF during 3 months as the independent variable. Nine(More)
OBJECTIVES/HYPOTHESIS The main purpose of the study was to determine the impact of uvulopalatopharyngoplasty (UPPP) on nasalance and nasality. It was hypothesized that nasalance would change from the presurgical to the postsurgical condition because the surgical protocol involves removal of palatal tissue. An additional objective of the study was to provide(More)
Speech samples of 20 adolescents and adults with Down's syndrome were analysed and compared with speech samples from 20 normal toddlers. Consonant, vowel and diphthong productions were studied. Error rate, sounds in error, nature of the errors and phonetic characteristics of the errors of both groups were compared. It was found that the similarities between(More)
  • John Van Borsel, Monica Medeiros de Britto Pereira
  • Journal of fluency disorders
  • 2005
UNLABELLED The present study investigated how well individuals knowledgeable about stuttering are able to make disfluency judgments in clients who speak another language than their own. Fourteen native speakers of Brazilian Portuguese identified and judged stuttering in Dutch speakers and in Portuguese speakers. Fourteen native speakers of Dutch identified(More)
UNLABELLED The present study investigated the language familiarity hypothesis formulated by Mackay [(1970). How does language familiarity influence stuttering under delayed auditory feedback? Perceptual and Motor Skills, 30, 655-669] that bilinguals speak faster and stutter less under delayed auditory feedback (DAF) when speaking their more familiar(More)
The effect of speech rate on overall intelligibility in Parkinson's Disease (PD) is still a matter of debate. A comparison of the results of previous studies on speech rate in PD is hampered by methodological differences. In this study, we evaluated the effects of levodopa on speech rate and on its variability in a standardized reading task. Twenty-five(More)
A 38-year-old right-handed male with no history of speech or language problems presented with neurogenic stuttering following an ischaemic lesion of the left thalamus. He stuttered severely in propositional speech (conversation, monologue, confrontation naming, and word retrieval) but only slightly in non-propositional speech (automatic speech, sound, word(More)