ERIC Number: EJ730616
Record Type: Journal
Publication Date: 2004-Jul
Crossed Apraxia of Speech: A Case Report
Balasubramanian, Venu; Max, Ludo
Brain and Cognition, v55 n2 p240-246 Jul 2004
The present study reports on the first case of crossed apraxia of speech (CAS) in a 69-year-old right-handed female (SE). The possibility of occurrence of apraxia of speech (AOS) following right hemisphere lesion is discussed in the context of known occurrences of ideomotor apraxias and acquired neurogenic stuttering in several cases with right hemisphere lesion. A current hypothesis on AOS-the dual route speech encoding (DRSE) hypothesis-and predictions based on DRSE were utilized to explore the nature of CAS in SE. One prediction based on the DRSE hypothesis is that there should be no difference in the frequency of occurrence of apraxic errors on words and non-words. This prediction was tested using a repetition task. The experimental stimuli included a list of minimal pairs that signaled voice-voiceless contrasts in words and non-words. Minimal-pair stimuli were presented orally, one at a time. SE's responses were recorded using audio and videotapes. Results indicate that SE's responses were characterized by numerous voicing errors. Most importantly, production of real word minimal pairs was superior to that of non-word minimal pairs. Implications of these results for the DRSE hypothesis are discussed with regard to currently developing perspectives on AOS.
Descriptors: Case Studies, Females, Brain Hemisphere Functions, Hypothesis Testing, Auditory Stimuli, Stuttering, Error Analysis (Language), Speech Language Pathology
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Publication Type: Journal Articles; Reports - Research
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