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Role of the motor system in language knowledge.

ABSTRACT: All spoken languages express words by sound patterns, and certain patterns (e.g., blog) are systematically preferred to others (e.g., lbog). What principles account for such preferences: does the language system encode abstract rules banning syllables like lbog, or does their dislike reflect the increased motor demands associated with speech production? More generally, we ask whether linguistic knowledge is fully embodied or whether some linguistic principles could potentially be abstract. To address this question, here we gauge the sensitivity of English speakers to the putative universal syllable hierarchy (e.g., blif ? bnif ? bdif ? lbif) while undergoing transcranial magnetic stimulation (TMS) over the cortical motor representation of the left orbicularis oris muscle. If syllable preferences reflect motor simulation, then worse-formed syllables (e.g., lbif) should (i) elicit more errors; (ii) engage more strongly motor brain areas; and (iii) elicit stronger effects of TMS on these motor regions. In line with the motor account, we found that repetitive TMS pulses impaired participants' global sensitivity to the number of syllables, and functional MRI confirmed that the cortical stimulation site was sensitive to the syllable hierarchy. Contrary to the motor account, however, ill-formed syllables were least likely to engage the lip sensorimotor area and they were least impaired by TMS. Results suggest that speech perception automatically triggers motor action, but this effect is not causally linked to the computation of linguistic structure. We conclude that the language and motor systems are intimately linked, yet distinct. Language is designed to optimize motor action, but its knowledge includes principles that are disembodied and potentially abstract.

SUBMITTER: Berent I

PROVIDER: S-EPMC4343166 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature

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Role of the motor system in language knowledge.

Berent Iris I Brem Anna-Katharine AK Zhao Xu X Seligson Erica E Pan Hong H Epstein Jane J Stern Emily E Galaburda Albert M AM Pascual-Leone Alvaro A

Proceedings of the National Academy of Sciences of the United States of America 20150202 7

All spoken languages express words by sound patterns, and certain patterns (e.g., blog) are systematically preferred to others (e.g., lbog). What principles account for such preferences: does the language system encode abstract rules banning syllables like lbog, or does their dislike reflect the increased motor demands associated with speech production? More generally, we ask whether linguistic knowledge is fully embodied or whether some linguistic principles could potentially be abstract. To ad ...[more]

PMID: 25646465

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Project description:BackgroundEarly childhood teachers (ECTs) play a significant role in equipping children with oral language and emergent literacy skills ahead of school entry. They are well positioned to play a vital role in ensuring preschool children receive a high-quality preschool curriculum to prepare them for later literacy learning.AimsThe purpose of this study was to explore early career ECTs' views and confidence regarding their role in providing preschoolers with oral language and emergent literacy support and to examine their perceptions of their preservice preparation.Methods & proceduresNine Australian early career ECTs were recruited via purposive sampling for an in-depth, semi-structured interview. Data were analysed using an inductive thematic analysis approach.Outcomes & resultsParticipants attached strong significance to their role in facilitating children's oral language growth and emergent literacy skills and reported a range of practices to support children's learning. However, they rarely referred to using established language facilitation strategies or using dialogic book reading prompts. Further, emergent literacy concepts such as phonological awareness and print awareness were not routinely described as features of participants' classroom activities. Participants did not consistently make a clear conceptual distinction between the constructs of oral language and emergent literacy and often used these terms interchangeably. Notably, participants indicated that they did not feel confident in their ability to identify preschool children who were not meeting developmental language milestones and reported that they felt poorly equipped to do so by their preservice training.Conclusions & implicationsECTs' strong willingness to support preschool children's oral language and emergent literacy skills may be hindered by gaps in their knowledge; these may contribute to important and missed opportunities for identifying and supporting preschoolers' oral language and emergent literacy growth.What this paper addsWhat is already known on this subject? High-quality learning experiences in preschool are important for maximising preschoolers' oral language and emergent literacy growth. Early childhood teachers can play an important role in facilitating this development and preparing children for later literacy learning. What this paper adds to existing knowledge? The study findings provide insight into ECTs' perceptions of their role and support in developing children's oral language and emergent literacy skills. The results indicated ECTs did not feel confident with their knowledge of children's language milestones or identifying children with language difficulties. Participants reported that their preservice training left them underprepared in the area of oral language. What are the potential or actual clinical implications of this work? ECTs demonstrated a strong willingness to support preschoolers' oral language and emergent literacy skills. However, their self-reported knowledge gaps and low confidence may have implications for the early detection of children who are not reaching language developmental milestones in a timely way.

Dataset Information

Role of the motor system in language knowledge.

Publications

Role of the motor system in language knowledge.

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