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Relating selective brain damage to impairments with voicing contrasts.

S M Ravizza1

  • 1Department of Psychology, University of California, Berkeley 94720, USA. ravizza@socrates.berkeley.edu

Brain and Language
|March 15, 2001
PubMed
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Neurological conditions like Parkinson's disease and aphasia impair speech voicing. This review identifies specific phonemic processing deficits in these patient groups.

Area of Science:

  • Neuroscience
  • Linguistics
  • Speech-Language Pathology

Background:

  • Voicing contrasts are crucial for speech perception and production.
  • Several neurological conditions are known to affect speech articulation and perception.
  • Deficits in processing voicing are common in various neurological patient groups.

Purpose of the Study:

  • To review research on how neurological groups perceive and produce speech voicing.
  • To discuss the specific deficits in voicing contrast perception and articulation.
  • To identify the neural areas contributing to these deficits and propose a processing model.

Main Methods:

  • Literature review of studies on neurological patient groups and voicing contrasts.
  • Analysis of reported deficits in perception and articulation of voicing.

Related Experiment Videos

  • Identification of neural correlates for observed speech impairments.

    • Main Results:

    • Patients with cerebellar damage, Parkinson's disease, specific language impairment, Broca's aphasia, apraxia, and Wernicke's aphasia exhibit voicing perception and production impairments.
    • Deficits vary across patient groups, affecting different aspects of voicing contrast processing.
    • Specific neural areas are implicated in the phonemic processing deficits observed.

    Conclusions:

    • Neurological damage significantly impacts the ability to perceive and produce speech voicing.
    • A model is proposed to explain phonemic processing impairments in different neurological conditions.
    • Further research and critical tests are needed to validate the proposed model.