Compensatory responses of articulators to unexpected perturbation of the palate shape

Influence of the Width and Cross-Sectional Shape of Major Connectors of Maxillary Dentures on the Accuracy of Speech Production

“…Additionally, subjects were required to pronounce six test words sequentially during one recording set, and the recording conditions were alternated with each recording set. Compared with the above-mentioned studies [38,39,40], the subjects hardly recognized the modifications in their oral cavities, and the speech tasks were far from being repetitive practices of syllables. Therefore, this study was conducted under the condition that short-term adaptation in the initial phase had hardly started, although obvious disorders in speech production were not perceived.…”

“…Honda et al [38] reported that productions of [∫a] and [t∫a] were usually correctly identified when auditory feedback was available using an air-controlled artificial palate. They asked the subjects to repeat each objective syllable.…”

Integration of auditory and somatosensory error signals in the neural control of speech movements

“…One approach has examined changes in motor behavior as a result of unexpected alterations of sensory feedback or perturbations of the effectors. For speech, such studies have observed immediate compensatory adjustments in the perturbed as well as nonperturbed articulators in response to mechanical perturbations of the lips or jaw (Folkins and Abbs 1975;Abbs and Gracco 1984), an altered hard palate (Honda et al 2002), and altered auditory feedback (Burnett et al 1998;Purcell and Munhall 2006b). A different approach involves perturbing sensory feedback or effector motion in a consistent rather than unexpected manner and examining the process of sensorimotor adaptation, a gradual learning of adjusted movements that achieve the desired sensory consequences.…”

Coupling Dynamics Interlip Coordination in Lower Lip Load Compensation

“…First, it should be noted that these data are different from the typical outcomes of studies in which the movement of the lip or lower jaw is interrupted unexpectedly during a very short interval (Abbs & Gracco, 1984;Folkins & Zimmermann, 1982;Gomi, Honda, Ito, & Murano, 2002;Gracco & Abbs, 1985, 1989Marzullo et al, 2010;Munhall, Löfqvist, & Kelso, 1994;Saltzman et al, 1998;Shaiman, 1989), the jaw is obstructed from moving for a longer period of time using a bite block (Folkins & Canty, 1986;Folkins & Zimmermann, 1981;McFarland & Baum, 1995;Namasivayam et al, , 2009, or in which the tongue is perturbed in following its usual trajectory by using an artificial palate (Baum & McFarland, 2000;Honda, Fujino, & Kaburagi, 2002;McFarland, Baum, & Chabot, 1996). In general, with a few exceptions (e.g., Bauer, Jäncke, & Kalveram, 1995), these studies show that individual speakers (to different degrees) compensate within a very short time frame for the perturbation by adjusting the movements of both the perturbed effector (lower lip, jaw, tongue) and the nonperturbed effector (upper lip or, in some cases, glottal activity), provided these effectors form a coordinative structure involved in producing a particular speech sound.…”