Visuomotor tracking abilities of speakers with apraxia of speech or conduction aphasia
Autor: | Carlin F. Hageman, George Woodworth, Donald A. Robin, Heather M. Clark, Adam Jacks |
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Rok vydání: | 2008 |
Předmět: |
Adult
Male Linguistics and Language medicine.medical_specialty Apraxias Movement Cognitive Neuroscience Experimental and Cognitive Psychology Motor program Neuropsychological Tests Audiology Apraxia Functional Laterality Speech Disorders Article Language and Linguistics Speech and Hearing Speech Production Measurement Communication disorder Conduction aphasia Aphasia Motor speech disorders medicine Humans Speech Language disorder Aphasia Conduction Aged Aged 80 and over Analysis of Variance Verbal Behavior Muscles Speech Intelligibility Motor control Middle Aged medicine.disease Lip Jaw Visual Perception Female medicine.symptom Psychology Photic Stimulation Psychomotor Performance Cognitive psychology |
Zdroj: | Brain and Language. 106:98-106 |
ISSN: | 0093-934X |
DOI: | 10.1016/j.bandl.2008.05.002 |
Popis: | This investigation examined the visuomotor tracking abilities of persons with apraxia of speech (AOS) or conduction aphasia (CA). In addition, tracking performance was correlated with perceptual judgments of speech accuracy. Five individuals with AOS and four with CA served as participants, as well as an equal number of healthy controls matched by age and gender. Participants tracked predictable (sinusoidal) and unpredictable signals using jaw and lip movements transduced with strain gauges. Tracking performance in participants with AOS was poorest for predictable signals, with decreased kinematic measures of cross-correlation and gain ratio and increased target-tracker difference. In contrast, tracking of the unpredictable signal by participants with AOS was performed as well as for other groups (e.g. participants with CA, healthy controls). Performance of the subjects with AOS on the predictable tracking task was found to strongly correlate with perceptual judgments of speech. These findings suggest that motor control capabilities are impaired in AOS, but not in CA. Results suggest that AOS has its basis in motor programming deficits, not impaired motor execution. |
Databáze: | OpenAIRE |
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