Speech motor control and stuttering: A computational model of adaptive sensory-motor processing
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Cited by (56)
Auditory feedback control in adults who stutter during metronome-paced speech II. Formant Perturbation
2022, Journal of Fluency DisordersCitation Excerpt :Several theories put forward in the literature suggest that stuttering occurs due to a reduced capacity for transforming sensory information to motor information (and vice versa; Hickok et al., 2011; Max et al., 2004; Neilson & Neilson, 1987). According to these theories, individual moments of stuttering occur when either a) insufficient neural resources are available to make this transformation and the whole system stops (Neilson & Neilson, 1987), or b) false errors are detected due to a disruption of the process that generates a sensory prediction (Hickok et al., 2011; Max et al., 2004), leading either to delays until the mismatch is resolved (Max et al., 2004), or iterative (erroneous) correction signals (Hickok et al., 2011). Several studies have used online sensory feedback manipulations to examine the integrity of these sensorimotor processes in people who stutter during speech.
Individual differences in attentional control predict working memory capacity in adults who stutter
2022, Journal of Communication DisordersDissociated Development of Speech and Limb Sensorimotor Learning in Stuttering: Speech Auditory-motor Learning is Impaired in Both Children and Adults Who Stutter
2020, NeuroscienceCitation Excerpt :Progress in addressing the latter question continues to lag as very few specific hypotheses have been formulated to suggest biologically plausible mechanisms that may explain the individual occurrences of sound/syllable repetitions and sound prolongations. In previous theoretical work, we have suggested one potential proximal cause that may occur within the sensorimotor system itself as the direct result of a dysfunction in well-documented sensorimotor mechanisms (Neilson and Neilson, 1987; Max et al., 2004; Max, 2004). In particular, the proposed framework was based on psychophysical data and computational modeling suggesting that for voluntary movements the central nervous system (CNS) relies on both (a) a controller that determines which motor commands will achieve a desired movement outcome (sometimes referred to as a control policy, feedback control policy, or internal inverse model), and (b) a feedback system that uses efference copy and an internal forward model in combination with afferent information and prior knowledge to best estimate the system state (e.g., Desmurget and Grafton, 2000; Kawato, 1999; Krakauer and Mazzoni, 2011; Shadmehr et al., 2010; Wolpert and Miall, 1996; Wolpert and Flanagan, 2009).
Nonword repetition and identification skills in Kannada speaking school-aged children who do and do not stutter
2020, Journal of Fluency DisordersAtypical non-verbal sensorimotor synchronization in adults who stutter may be modulated by auditory feedback
2017, Journal of Fluency DisordersCitation Excerpt :Our finding of an effect of suppressed auditory feedback on the performance of some IWS suggests that auditory feedback may modulate temporal accuracy to synchronize to an auditory stimulus in IWS. This finding would be consistent with theoretical models of sensorimotor dysfunction and deficient auditory-motor coupling in stuttering (Civier et al., 2010; Max, 2004; Neilson & Neilson, 1987), findings of functional and structural abnormalities in brain areas supporting auditory-motor integration in IWS (Braun et al., 1997; Chang et al., 2009; Chang & Zhu, 2013; Foundas et al., 2001; Fox et al., 1996; Watkins et al., 2008; Yang, Jia, Siok, & Tan, 2016) and the well-known fact of reduced stuttering during artificially altered auditory feedback conditions. To our knowledge, this is the first study that demonstrates a similar effect in a non-verbal sensorimotor task with IWS.