Differential diagnosis between apraxia and dysarthria based on acoustic analysis

  1. Melle Hernández, Natalia 1
  2. Gallego López, Carlos 1
  1. 1 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

Journal:
The Spanish Journal of Psychology

ISSN: 1138-7416

Year of publication: 2012

Volume: 15

Issue: 2

Pages: 495-504

Type: Article

DOI: 10.5209/REV_SJOP.2012.V15.N2.38860 DIALNET GOOGLE SCHOLAR lock_openOpen access editor

More publications in: The Spanish Journal of Psychology

Abstract

Acoustic analysis provides objective quantitative measures of speech that enable a comprehensive and accurate understanding of motor disorders and complement the traditional measures. This paper aims to distinguish between normal and pathological speech, more specifically between apraxia of speech and spastic dysarthria in native Spanish speaking patients using acoustic parameters. Participants (4 aphasic with apraxia of speech, 4 with spastic dysarthria, and 15 without speech disorders) performed three different tasks: repeating the syllable sequence [pa-ta-ka], repeating the isolated syllable [pa] and repeating the vowel sequence [i-u]. The results showed that the normative values of motor control, in general, coincide with those obtained in previous research on native English speakers. They also show that damage to motor control processes results in a decrease in the rate of alternating and sequential movements and an increase in the inter-syllabic time for both types of movements. A subset of the acoustic parameters analyzed, those that measure motor planning processes, enable differentiation between normal population and apraxic and dysarthric patients, and between the latter. The differences between the pathological groups support the distinction between motor planning and motor programming as described by van der Merwe's model of sensorimotor processing (1997).

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