Speech motor programming in apraxia of speech

2002 ◽  
Vol 30 (3) ◽  
pp. 321-335 ◽  
Author(s):  
Karin Deger ◽  
Wolfram Ziegler
Keyword(s):  
Motor Programming ◽  
Apraxia Of Speech ◽  
Speech Motor

Speech Motor Programming in Apraxia of Speech: Evidence From a Delayed Picture-Word Interference Task

2013 ◽  
Vol 22 (2) ◽  
Author(s):  
Marja-Liisa Mailend ◽  
Edwin Maas
Keyword(s):  
Matched Control ◽  
Reaction Times ◽  
Motor Programming ◽  
Control Group ◽  
Apraxia Of Speech ◽  
Specific Nature ◽  
Interference Task ◽  
Motor Programs ◽  
Speech Motor ◽  
Preliminary Support

Purpose Apraxia of speech (AOS) is considered a speech motor programming impairment, but the specific nature of the impairment remains a matter of debate. This study investigated 2 hypotheses about the underlying impairment in AOS framed within the Directions Into Velocities of Articulators (DIVA; Guenther, Ghosh, & Tourville, 2006) model: The retrieval hypothesis states that access to the motor programs is impaired, and the damaged programs hypothesis states that the motor programs themselves are damaged. Method The experiment used a delayed picture-word interference paradigm in which participants prepare their response and auditory distracters are presented with the go signal. The overlap between target and distracter words was manipulated (i.e., shared sounds or no shared sounds), and participants' reaction times (RTs) were measured. Participants included 5 speakers with AOS (4 with concomitant aphasia), 2 speakers with aphasia without AOS, and 9 age-matched control speakers. Results The control speakers showed no effects of distracter type or presence. The speakers with AOS had longer RTs in the distracter condition compared to the no-distracter condition. The speakers with aphasia without AOS were comparable to the control group in their overall RTs and RT pattern. Conclusion Results provide preliminary support for the retrieval hypothesis, suggesting that access to motor programs may be impaired in speakers with AOS. However, the possibility that the motor programs may also be damaged cannot be ruled out.

scholarly journals Brain changes underlying progression of speech motor programming impairment

2021 ◽  
Author(s):  
Ramon Landin-Romero ◽  
Cheng T Liang ◽  
Penelope A Monroe ◽  
Yuichi Higashiyama ◽  
Cristian E Leyton ◽  
...  
Keyword(s):  
Speech Production ◽  
Primary Progressive Aphasia ◽  
Brain Regions ◽  
Motor Programming ◽  
Apraxia Of Speech ◽  
Progressive Aphasia ◽  
Primary Progressive ◽  
Word Duration ◽  
Variability Index ◽  
Speech Motor

Abstract Aquired apraxia of speech is a disorder that impairs speech production, despite intact peripheral neuromotor function. Its pathomechanism remains to be established. Neurodegenerative lesion models provide an unequalled opportunity to explore the neural correlates of apraxia of speech, which is present in a subset of patients diagnosed with non-semantic variants of primary progressive aphasia. The normalised pairwise variability index, an acoustic measure of speech motor programming, has shown high sensitivity and specificity for apraxia of speech in cross-sectional studies. Here, we aimed to examine the strength of the pairwise variability index and overall word duration (i.e. articulation rate) as markers of progressive motor programming deficits in primary progressive aphasia with apraxia of speech. Seventy-nine individuals diagnosed with primary progressive aphasia (39 with non-fluent variant, 40 with logopenic variant) and 40 matched healthy controls participated. Patients were followed-up annually (range 1–6 years, median number of visits = 2). All participants completed a speech assessment task and a high-resolution MRI. Our analyses investigated trajectories of speech production (e.g. pairwise variablity index and word duration) and associations with cortical atrophy in the patients. At first presentation, word duration differentiated the nonfluent and logopenic cases statistically, but the range of scores overlapped substantially across groups. Longitudinally, we observed progressive deterioration in pairwise variability index and word duration specific to the non-fluent group only. The pairwise variability index showed particularly strong associations with progressive atrophy in speech motor programming brain regions. Of novelty, our results uncovered a key role of the right frontal gyrus in underpinning speech motor programming changes in non-fluent cases, highlighting the importance of right brain regions in responding to progressive neurological changes in the speech motor network. Taken together, our findings validate the use of a new metric, the pairwise variability index, as a robust marker of apraxia of speech in contrast to more generic measures of speaking rate. Sensitive/specific neuroimaging biomarkers of the emergence and progression of speech impairments will be useful to inform theories of the pathomechanisms underpinning impaired speech motor control. Our findings justify developing more sensitive measures of rhythmic temporal control of speech that may enable confident detection of emerging speech disturbances and more sensitive tracking of intervention-related changes for pharmacological, neuromodulatory, and behavioural interventions. A more reliable detection of speech disturbances has relevance for patient care, with predominance of progressive apraxia of speech a high-risk factor for later diagnosis of progressive supranuclear palsy or corticobasal degeneration.

What Does It Mean to Be Social? Defining the Social Landscape for Children With Childhood Apraxia of Speech

2020 ◽  
Vol 5 (4) ◽  
pp. 843-852 ◽  
Author(s):  
Nancy Tarshis ◽  
Michelle Garcia Winner ◽  
Pamela Crooke
Keyword(s):  
Social Development ◽  
Social Goals ◽  
Apraxia Of Speech ◽  
Childhood Apraxia Of Speech ◽  
Social Competencies ◽  
The Social ◽  
Social Landscape ◽  
Communication Challenges ◽  
Primary Focus ◽  
Speech Motor

Purpose What does it mean to be social? In addition, how is that different from behaving socially appropriately? The purpose of this clinical focus article is to tackle these two questions along with taking a deeper look into how communication challenges in childhood apraxia of speech impact social competencies for young children. Through the lens of early social development and social competency, this clinical focus article will explore how speech motor challenges can impact social development and what happens when young learners miss early opportunities to grow socially. While not the primary focus, the clinical focus article will touch upon lingering issues for individuals diagnosed with childhood apraxia of speech as they enter the school-aged years. Conclusion Finally, it will address some foundational aspects of intervention and offer ideas and suggestions for structuring therapy to address both speech and social goals.

A neurophonetic perspective on articulation planning

2020 ◽  
Author(s):  
Wolfram Ziegler
Keyword(s):  
Motor Learning ◽  
Higher Order ◽  
Speech Development ◽  
Word Production ◽  
Apraxia Of Speech ◽  
Clinical Model ◽  
Motor Processes ◽  
Speech Motor Learning ◽  
Speech Motor ◽  
Production Accuracy

This paper gives an overview of a model that predicts articulation ease for German phonological words on the basis of error data from patients with apraxia of speech (AOS). AOS is introduced as a clinical model of higher order motor processes for articulation. Word production accuracy in AOS is considered as a window into the structure of articulation plans as acquired through speech motor learning in childhood. The NLG model of apraxia of speech is explained. Applications in speech development and adult speech are outlined.

scholarly journals Examining speech motor planning difficulties in apraxia of speech and aphasia via the sequential production of phonetically similar words

2020 ◽  
pp. 1-16
Author(s):  
Marja-Liisa Mailend ◽  
Edwin Maas ◽  
Pélagie M. Beeson ◽  
Brad H. Story ◽  
Kenneth I. Forster
Keyword(s):  
Motor Planning ◽  
Apraxia Of Speech ◽  
Speech Motor

scholarly journals Speech motor planning in the context of phonetically similar words: Evidence from apraxia of speech and aphasia

2019 ◽  
Vol 127 ◽  
pp. 171-184 ◽  
Author(s):  
Marja-Liisa Mailend ◽  
Edwin Maas ◽  
Pélagie M. Beeson ◽  
Brad H. Story ◽  
Kenneth I. Forster
Keyword(s):  
Motor Planning ◽  
Apraxia Of Speech ◽  
Speech Motor
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