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Differentiating profiles of speech impairments in Friedreich's ataxia: a perceptual and instrumental approach
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Measures of spectral change and their application to habitual, slow, and clear speaking modes
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Spectral measures of the effects of Friedreich's ataxia on speech
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Kinematic analysis of lingual movements during consonant productions in dysarthric speakers with Friedreich's ataxia: A case-by-case analysis
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Modulation of N400 in chronic non-fluent aphasia using low frequency Repetitive Transcranial Magnetic Stimulation (rTMS)
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Differentiating Impairment Levels in Temporal Versus Spatial Aspects of Linguopalatal Contacts in Friedreich's Ataxia
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Articulatory disturbance in Friedreich's ataxia: An electropalatographic study
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In: 13th International Congress of Parkinsons Disease and Movement Disorders (2009)
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Speech production in Parkinson's disease: II. Acoustic and electropalatographic investigation of sentence, word and segment durations
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Speech production in Parkinson's disease: I. An electropalatographic investigation of tongue-palate contact patterns
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Six-month outcome for dysphagia following traumatic brain injury: Radiological assessment.
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In: Journal of Medical Speech - Language Pathology , 13 (2) pp. 109-125. (2005) (2005)
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Analysis of articulatory dynamics in dysarthria following brain injury in childhood using electromagnetic articulography and electropalatography
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Kinematic analysis of jaw function in children following traumatic brain injury
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Articulatory function following traumatic brain injury in childhood: A perceptual and instrumental analysis
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The mismatch negativity (MMN) response to complex tones and spoken words in individuals with aphasia
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Abstract:
Background: The mismatch negativity (MMN) is a fronto-centrally distributed event-related potential (ERP) that is elicited by any discriminable auditory change. It is an ideal neurophysiological tool for measuring the auditory processing skills of individuals with aphasia because it can be elicited even in the absence of attention. Previous MMN studies have shown that acoustic processing of tone or pitch deviance is relatively preserved in aphasia, whereas the basic acoustic processing of speech stimuli can be impaired (e.g., auditory discrimination). However, no MMN study has yet investigated the higher levels of auditory processing, such as language-specific phonological and/or lexical processing, in individuals with aphasia. Aims: The aim of the current study was to investigate the MMN response of normal and language-disordered subjects to tone stimuli and speech stimuli that incorporate the basic auditory processing (acoustic, acoustic-phonetic) levels of non-speech and speech sound processing, and also the language-specific phonological and lexical levels of spoken word processing. Furthermore, this study aimed to correlate the aphasic MMN data with language performance on a variety of tasks specifically targeted at the different levels of spoken word processing. Methods M Procedures: Six adults with aphasia (71.7 years +/- 3.0) and six healthy age-, gender-, and education-matched controls (72.2 years +/- 5.4) participated in the study. All subjects were right-handed and native speakers of English. Each subject was presented with complex harmonic tone stimuli, differing in pitch or duration, and consonant-vowel (CV) speech stimuli (non-word /de:/versus real world/deI/). The probability of the deviant for each tone or speech contrast was 10%. The subjects were also presented with the same stimuli in behavioural discrimination tasks, and were administered a language assessment battery to measure their auditory comprehension skills. Outcomes O Results: The aphasic subjects demonstrated attenuated MMN responses to complex tone duration deviance and to speech stimuli (words and non-words), and their responses to the frequency, duration, and real word deviant stimuli were found to strongly correlate with performance on the auditory comprehension section of the Western Aphasia Battery (WAB). Furthermore, deficits in attentional lexical decision skills demonstrated by the aphasic subjects correlated with a word-related enhancement demonstrated during the automatic MMN paradigm, providing evidence to support the word advantage effect, thought to reflect the activation of language-specific memory traces in the brain for words. Conclusions: These results indicate that the MMN may be used as a technique for investigating general and more specific auditory comprehension skills of individuals with aphasia, using speech and/or non-speech stimuli, independent of the individual's attention. The combined use of the objective MMN technique and current clinical language assessments may result in improved rehabilitative management of aphasic individuals.
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Keyword:
321024 Rehabilitation and Therapy - Occupational and Physical; 730303 Occupational; Auditory-discrimination; Behavioral Evidence; C1; Clinical Neurology; Cognitive Neuroscience; Event-related Potentials; Human Brain; Left-hemisphere Stroke; Memory Traces; Phoneme Representations; Sound Duration; speech and physiotherapy; Speech Stimuli
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URL: https://espace.library.uq.edu.au/view/UQ:77040
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Perceptual and instrumental evaluation of voice and tongue function after carotid endarterectomy
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The relationship between the mismatch negativity (MMN) and psycholinguistic models of spoken word processing
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Perceptual and instrumental analysis of laryngeal function after traumatic brain injury in childhood
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Complex language functions and subcortical mechanisms: evidence from Huntington's disease and patients with non-thalamic subcortical lesions
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Use of electromagnetic articulography in the assessment of articulatory dysfunction in patients with speech disorders subsequent to traumatic brain injury
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