Elsevier

Brain and Language

Volume 33, Issue 1, January 1988, Pages 146-160
Brain and Language

Language production in Parkinson's disease: Acoustic and linguistic considerations

https://doi.org/10.1016/0093-934X(88)90059-4Get rights and content

Abstract

The hypokinetic dysarthria of Parkinson's disease (PD) has been described extensively. In contrast, patterns of hesitation and the language structure in spontaneous speech of the PD patient have not been investigated, although several studies have shown language-related abnormalities in word naming, word generation, and verbal recall. In the present study, 10 male Parkinson's patients and 10 normal male speakers were compared in a reading and spontaneous speaking paradigm for acoustic and linguistic features. Among acoustic measures, fundamental frequency and relative intensity differentiated PD from control subjects, consistent with reported features of hypokinetic dysarthria. The striking observations among linguistic measures differentiating PD from control subjects were an increase in the number of (a) silent hesitations per minute, (b) abnormally long silent hesitations, (c) words per silent hesitation, (d) open class phrases, and (e) optional open phrases per speech sample, and a decrease in the number of modalizations and interjections. An increase in the number of filled hesitations occurring per minute, as well as a decrease in syntactic complexity separated moderate from mild Parkinson's patients. Our interpretation of the data favors the hypothesis that changes in the structure of spontaneous language production with increasing severity of dysarthria reflect PD patients' adaptation to their disease.

References (48)

  • M.L. Albert

    Subcortical dementia

  • J.L. Austin

    How to do things with words

    (1962)
  • K. Bayles

    Language deficits in Huntington's and Parkinson's disease

  • K. Bayles et al.

    The potential of language tasks for identifying senile dementia

    Journal of Speech and Hearing Disorders

    (1982)
  • D.F. Benson

    Parkinsonian dementia: cortical or subcortical?

  • D.S. Boomer

    Hesitation and grammatical encoding

    Language and Speech

    (1965)
  • F.P. Bowen et al.

    Parkinsonism: Effect of levo-dopa treatment in concept formation

    Neurology

    (1975)
  • D.C. Bradley

    Computational distinctions of vocabulary type

  • J. Bresnan

    Mental representation of grammatical relations

    (1982)
  • N. Chomsky

    Aspects of the theory of syntax

    (1966)
  • J.L. Cummings et al.

    Dementia: A clinical approach

    (1983)
  • F.L. Darley et al.

    Motor speech disorders

    (1975)
  • M. Ford

    Planning units and syntax in sentence production

  • F. Goldman-Eisler

    Hesitation, information and levels of speech production

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