Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"speech motor"”.
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The control of speech motor targets
Studies of speech production and its control have traditionally focused on acoustic parameters and/or articulatory configurations of the end result of the production process as the target of speech production. The representations of production target, however, are far richer than the stereotypical …
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Stuttering: Studies of therapy outcome and speech motor control
Contains fulltext : 29838.pdf (Publisher’s version ) (Open Access)
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The Effects of Divided Attention on Speech Motor, Verbal Fluency and Manual Motor Task Performance
… performance. Twenty young adults completed a speech task (repeating a sentence), a verbal fluency task (listing words beginning with the same letter), and right- and left-handed motor tasks (placing pegs and washers in a peg board) in isolation and in concurrent conditions. Speech kinematic …
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Characterizing Speech Motor Pattern in Minimally Verbal Adults with Autism Spectrum Disorder via Surface Electromyography
… Spectrum Disorder (mvASD) experience significant speech production challenges linked to impaired motor skills. Despite the prevalence of these speech difficulties, the underlying motor mechanisms remain poorly understood. This thesis investigates the neuromuscular activity associated with speech …
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Speech Motor Control in Younger and Older Adults: The Effect of Age and Individual Differences on Speech Error Production
… dissertation investigates three main issues in speech motor control, all of which are explored through the lens of speech error production. The speech error elicitation task used is the alternating onset, identical coda (e.g. ‘top cop’) paradigm, which in this incarnation is executed in time to …
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The application of linear and nonlinear estimators of acoustic variability in the assessment of speech motor control in hypokinetic dysarthria
… measures in the assessment and treatment of speech disorders, researchers and clinicians are always in search of new techniques to quantify speech impairment. This thesis investigates the relatively unexplored area of linear and nonlinear estimators of acoustic variability and their …
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Auditory-motor integration influences on speech motor control and fluency: a comparison of normally fluent speakers and people who stutter
… effects of delayed auditory feedback (DAF) on speech motor stability and speech fluency in normally fluent adults (PWNS) and to compare them with effects on adults who exhibit persistent stuttering. If the auditory processing influences differently the two groups, it might shed light on the …
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Assessing functional links between speech production and perception in multilingual speakers
The relationship between speech production and speech perception capacities is highly debated. The picture is complicated further by studies of second language acquisition, where development of speech perception is not always accompanied by proportional gains in speech production, and vice versa. …
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Neural representations used by brain regions underlying speech production
Speech utterances are phoneme sequences but may not always be represented as such in the brain. For instance, electropalatography evidence indicates that as speaking rate increases, gestures within syllables are manipulated separately but those within consonant clusters act as one motor unit. …
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EEG activation patterns in the frontal lobes of stutterers and nonstutterers during working memory tasks
… stuttering is a physiological disorder of speech motor control. Unlike acquired conditions, developmental stuttering is responsive to fluency-inducing conditions involving the manipulation or elimination of auditory feedback. It was hypothesized that stutterers experience interference …
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Regional Differences in Brain Structure Underlying Childhood Stuttering Persistence and Recovery: An MRI Study
… subcortical, and cerebellar regions critical for speech motor sequencing and sensorimotor integration, such as the left inferior frontal area, bilateral temporoparietal regions, as well as several areas in the basal ganglia and thalamus. When CWPS and CWRS were compared, the latter often exhibited …
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Identification of Traits Transmitted Associated With Stuttering
… complex tasks might be based in different speech motor control strategies that these groups may be thought to possess. Performance on the non-word repetition task was similar for all groups indicating that phonological and auditory memory may not be closely related to stuttering. Further …
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A Perceptual, Acoustic-Phonetic, and Linguistic Analysis of Cluttering
A speech sample of a 10 year old boy diagnosed as a clutterer was analyzed perceptually and spectrographically to determine what, if any, unique features distinguished his cluttered speech. These analyses were conducted on ten utterances that were judged to contain cluttering. The subject repeated …
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Effects of Delayed Auditory Feedback on the Bereitschaftspotential
… the preparatory state of a person prior to motor execution of an act and can be observed 1500 to 500 ms prior to voluntary movement. The participants in the study included 10 adults with normal speech. Each read a series of 30 sentences, both without DAF and with DAF, while the BP was …
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FMRI studies of effects of hearing status on audio-visual speech perception
… neurological processes of visual influences on speech perception and to investigate effects of hearing status on AV speech perception. More specifically, functional magnetic resonance imaging (fMRI) was used to investigate the brain activity underlying audio-visual speech perception in three …
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Adaptive auditory-motor control of the time-varying formant trajectories in vowels and its patterns of generalization
… auditory feedback-based learning and control of speech movements is not restricted to quasi-static gestures in monophthongs as found in previous studies, but also extends to time-varying gestures. To probe the internal structure of the mechanisms of auditory-motor transformations in speech, we …
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Characterization of phoneme rate as a vocal biomarker of depression
… scalable indicators of a disorder. A person's speech is a rich source of neurocognitive information because speech production is a complex sensorimotor task that draws upon many cortical and subcortical regions. Furthermore, the ease of collection makes speech a practical, scalable candidate …
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The articulatory basis of positional asymmetries in phonological acquisition
… effects will cease to apply. Because children's speech-motor control capabilities are known to diverge from those of the skilled adult speaker, it is posited that articulatory factors play the dominant role in shaping child-specific phonological processes. Here it is argued that children have …
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The Active Ingredients of Integral Stimulation Treatment: The Efficacy of Auditory, Visual, and Auditory-Visual Cues for Treatment of Childhood Apraxia of Speech
… (IS) treatment for childhood apraxia of speech (CAS). Previous literature has supported the use of IS for children with CAS, though there are no studies that evaluate the active ingredients of IS. This study aimed to examine the efficacy of single- and multi-modality cues in IS treatment. …
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How are inhibitory demands created and avoided in developmental tasks?
… complexity leads to ‘slow mapping’ between speech perception and motor production. On hearing speech, motor representations are activated only a little or not at all: verbal imitation is not automatic. Chapter Three investigates an alternative account of why verbal imitation is easy for …
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