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The Relationship Between Apraxia of Speech and Oral Apraxia: Association or Dissociation?

Whiteside, SP; Dyson, L; Cowell, PE; Varley, RA; (2015) The Relationship Between Apraxia of Speech and Oral Apraxia: Association or Dissociation? Archives of Clinical Neuropsychology , 30 (7) pp. 670-682. 10.1093/arclin/acv051. Green open access

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Abstract

Acquired apraxia of speech (AOS) is a motor speech disorder that affects the implementation of articulatory gestures and the fluency and intelligibility of speech. Oral apraxia (OA) is an impairment of nonspeech volitional movement. Although many speakers with AOS also display difficulties with volitional nonspeech oral movements, the relationship between the 2 conditions is unclear. This study explored the relationship between speech and volitional nonspeech oral movement impairment in a sample of 50 participants with AOS. We examined levels of association and dissociation between speech and OA using a battery of nonspeech oromotor, speech, and auditory/aphasia tasks. There was evidence of a moderate positive association between the 2 impairments across participants. However, individual profiles revealed patterns of dissociation between the 2 in a few cases, with evidence of double dissociation of speech and oral apraxic impairment. We discuss the implications of these relationships for models of oral motor and speech control.

Type: Article
Title: The Relationship Between Apraxia of Speech and Oral Apraxia: Association or Dissociation?
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/arclin/acv051
Publisher version: http://dx.doi.org/10.1093/arclin/acv051
Language: English
Additional information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Archives of Clinical Neuropsychology following peer review. The version of record Whiteside, SP; Dyson, L; Cowell, PE; Varley, RA; (2015) The Relationship Between Apraxia of Speech and Oral Apraxia: Association or Dissociation? Archives of Clinical Neuropsychology , 30 (7) pp. 670-682, is available online at: http://dx.doi.org/10.1093/arclin/acv051.
Keywords: Association, Dissociation, Oral apraxia, Speech apraxia, Stroke
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Language and Cognition
URI: https://discovery.ucl.ac.uk/id/eprint/1473055
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