scholarly journals The coupling between auditory and motor cortices is rate-restricted: Evidence for an intrinsic speech-motor rhythm

2018 ◽  
Vol 4 (2) ◽  
pp. eaao3842 ◽  
Author(s):  
M. Florencia Assaneo ◽  
David Poeppel
Keyword(s):  
Motor Rhythm ◽  
Speech Motor

Cognitive Load Affects Speech Motor Performance Differently in Older and Younger Adults

2019 ◽  
Vol 62 (5) ◽  
pp. 1258-1277 ◽  
Author(s):  
Megan K. MacPherson
Keyword(s):  
Older Adults ◽  
Cognitive Load ◽  
Motor Performance ◽  
Age Groups ◽  
Incongruent Condition ◽  
Sentence Production ◽  
Movement Duration ◽  
Production Task ◽  
Younger Adults ◽  
Speech Motor

PurposeThe aim of this study was to determine the impact of cognitive load imposed by a speech production task on the speech motor performance of healthy older and younger adults. Response inhibition, selective attention, and working memory were the primary cognitive processes of interest.MethodTwelve healthy older and 12 healthy younger adults produced multiple repetitions of 4 sentences containing an embedded Stroop task in 2 cognitive load conditions: congruent and incongruent. The incongruent condition, which required participants to suppress orthographic information to say the font colors in which color words were written, represented an increase in cognitive load relative to the congruent condition in which word text and font color matched. Kinematic measures of articulatory coordination variability and movement duration as well as a behavioral measure of sentence production accuracy were compared between groups and conditions and across 3 sentence segments (pre-, during-, and post-Stroop).ResultsIncreased cognitive load in the incongruent condition was associated with increased articulatory coordination variability and movement duration, compared to the congruent Stroop condition, for both age groups. Overall, the effect of increased cognitive load was greater for older adults than younger adults and was greatest in the portion of the sentence in which cognitive load was manipulated (during-Stroop), followed by the pre-Stroop segment. Sentence production accuracy was reduced for older adults in the incongruent condition.ConclusionsIncreased cognitive load involving response inhibition, selective attention, and working memory processes within a speech production task disrupted both the stability and timing with which speech was produced by both age groups. Older adults' speech motor performance may have been more affected due to age-related changes in cognitive and motoric functions that result in altered motor cognition.

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.

Physiologic Studies Provide New Perspectives on Early Speech Development

2010 ◽  
Vol 20 (2) ◽  
pp. 29-36
Author(s):  
Erin M. Wilson ◽  
Ignatius S. B. Nip
Keyword(s):  
Motor Control ◽  
Motor Development ◽  
Motion Tracking ◽  
Speech Development ◽  
Speech Motor Control ◽  
Therapeutic Approaches ◽  
Facial Motion ◽  
Disordered Speech ◽  
Speech Motor ◽  
Physiologic Data

Abstract Although certain speech development milestones are readily observable, the developmental course of speech motor control is largely unknown. However, recent advances in facial motion tracking systems have been used to investigate articulator movements in children and the findings from these studies are being used to further our understanding of the physiologic basis of typical and disordered speech development. Physiologic work has revealed that the emergence of speech is highly dependent on the lack of flexibility in the early oromotor system. It also has been determined that the progression of speech motor development is non-linear, a finding that has motivated researchers to investigate how variables such as oromotor control, cognition, and linguistic factors affect speech development in the form of catalysts and constraints. Physiologic data are also being used to determine if non-speech oromotor behaviors play a role in the development of speech. This improved understanding of the physiology underlying speech, as well as the factors influencing its progression, helps inform our understanding of speech motor control in children with disordered speech and provide a framework for theory-driven therapeutic approaches to treatment.

Control of feeding motor output by paracerebral neurons in brain of Pleurobranchaea californica

1982 ◽  
Vol 47 (5) ◽  
pp. 885-908 ◽  
Author(s):  
R. Gillette ◽  
M. P. Kovac ◽  
W. J. Davis
Keyword(s):  
Feeding Behavior ◽  
Action Potentials ◽  
Tactile Stimulation ◽  
Natural Food ◽  
Buccal Ganglion ◽  
Pleurobranchaea Californica ◽  
Feeding Rhythm ◽  
Intracellular Stimulation ◽  
Motor Rhythm ◽  
Stimulation Of

1. A population of interneurons that control feeding behavior in the mollusk Pleurobranchaea has been analyzed by dye injection and intracellular stimulation/recording in whole animals and reduced preparations. The population consists of 12-16 somata distributed in two bilaterally symmetrical groups on the anterior edge of the cerebropleural ganglion (brain). On the basis of their position adjacent to the cerebral lobes, these cells have been named paracerebral neurons (PCNs). This study concerns pme subset pf [MCs. the large, phasic ones, which have the strongest effect on the feeding rhythm (21). 2. Each PCN sends a descending axon via the ipsilateral cerebrobuccal connective to the buccal ganglion. Axon branches have not been detected in other brain or buccal nerves and hence the PCNs appear to be interneurons. 3. In whole-animal preparations, tonic intracellular depolarization of the PNCs causes them to discharge cyclic bursts of action potentials interrupted by a characteristic hyperpolarization. In all specimens that exhibit feeding behavior, the interburst hyperpolarization is invariably accompanied by radula closure and the beginning of proboscis retraction (the "bite"). No other behavorial effect of PCN stimulation has been observed. 4. In whole-animal preparations, the PCNs are excited by food and tactile stimulation of the oral veil, rhinophores, and tentacles. When such stimuli induce feeding the PCNs discharge in the same bursting pattern seen during tonic PCN depolarization, with the cyclic interburst hyperpolarization phase locked to the bit. When specimens egest an unpalatable object by cyclic buccal movements, however, the PCNs are silent. The PCNs therefore exhibit properties expected of behaviorally specific "command" neurons for feeding. 5. Silencing one or two PCNs by hyperpolarization may weaken but does not prevent feeding induced by natural food stimuli. Single PCNs therefore can be sufficient but are not necessary to induction of feeding behavior. Instead the PCNs presumably operate as a population to control feeding. 6. In isolated nervous system preparations tonic extracellular stimulation of the stomatogastric nerve of the buccal ganglion elicits a cyclic motor rhythm that is similar in general features to the PNC-induced motor rhythm. Bursts of PCN action potentials intercalated at the normal phase position in this cycle intensify the buccal rhythm. Bursts of PCN impulses intercalated at abnormal phase positions reset the buccal rhythm. The PCNs, therefore, also exhibit properties expected of pattern-generator elements and/or coordinating neurons for the buccal rhythm. 7. The PCNs are recruited into activity when the buccal motor rhythm is elicited by stomatogastric nerve stimulation or stimulation of the reidentifiable ventral white cell. The functional synergy between the PCNs and the buccal rhythm is therefore reciprocal. 8...

Clinical Assessment of Oropharyngeal Motor Development in Young Children

1987 ◽  
Vol 52 (3) ◽  
pp. 271-277 ◽  
Author(s):  
JoAnne Robbins ◽  
Thomas Klee
Keyword(s):  
Clinical Application ◽  
Clinical Assessment ◽  
Motor Development ◽  
Structural Integrity ◽  
Vocal Tract ◽  
Developmental Change ◽  
Clinical Protocol ◽  
Motor Functioning ◽  
Motor Abilities ◽  
Speech Motor

A clinical protocol was developed for the purpose of assessing the oral and speech motor abilities of children. An 86-item test was administered to 90 normally developing children aged 2:6–6:11. Evaluations of the structural integrity of the vocal tract did not show developmental change, although evaluations of oral and speech motor functioning changed significantly with age. The functional portion of the protocol was most sensitive to developmental change up to age 3:6, with an asymptote in performance thereafter. Clinical application of the protocol is discussed.

Speech Motor Development During Acquisition of the Voicing Contrast

2005 ◽  
Vol 48 (4) ◽  
pp. 739-752 ◽  
Author(s):  
Maria I. Grigos ◽  
John H. Saxman ◽  
Andrew M. Gordon
Keyword(s):  
Motor Development ◽  
Voicing Contrast ◽  
Speech Motor

Goal-based speech motor control: A theoretical framework and some preliminary data

1995 ◽  
Vol 23 (1-2) ◽  
pp. 23-35 ◽  
Author(s):  
Joseph S. Perkell ◽  
Melanie L. Matthies ◽  
Mario A. Svirsky ◽  
Michael I. Jordan
Keyword(s):  
Motor Control ◽  
Preliminary Data ◽  
Theoretical Framework ◽  
Speech Motor Control ◽  
Speech Motor
Sign in / Sign up

Export Citation Format

Share Document