Original Research

An exploratory study of an undefined acquired neuromotor speech disorder within the context of the four level framework for speech sensorimotor control

Dunay Schmulian, Anita van der Merwe, Emily Groenewald
South African Journal of Communication Disorders | Vol 44, No 1 | a230 | DOI: https://doi.org/10.4102/sajcd.v44i1.230 | © 2019 Dunay Schmulian, Anita van der Merwe, Emily Groenewald | This work is licensed under CC Attribution 4.0
Submitted: 12 October 2016 | Published: 31 December 1997

About the author(s)

Dunay Schmulian, Department of Communication Pathology, University of Pretoria, South Africa
Anita van der Merwe, Department of Communication Pathology, University of Pretoria, South Africa
Emily Groenewald, Department of Communication Pathology, University of Pretoria, South Africa

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Abstract

In this study, the speech of a 28-year-old male with acquired brain injury and who presents with an undefined neuromotor speech disorder which cannot be categorised as either apraxia of speech or dysarthria, is described. Voice onset time, vowel duration, utterance duration and vowel formant analyses were done acoustically. A perceptual analysis and intelligibility rating were also executed. The subject was found to present with unique perceptual symptoms, intelligible speech, prolonged sound duration and distorted vowel quality. The results are interpreted within the context of the Four Level Framework of Speech Sensorimotor Control (Van der Merwe, 1997).

Keywords

neuromotor speech disorders; Four Level Framework

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