دورية أكاديمية
Generating variability from motor primitives during infant locomotor development
| العنوان: | Generating variability from motor primitives during infant locomotor development |
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| المؤلفون: | Elodie Hinnekens, Marianne Barbu-Roth, Manh-Cuong Do, Bastien Berret, Caroline Teulier |
| المصدر: | eLife, Vol 12 (2023) |
| بيانات النشر: | eLife Sciences Publications Ltd, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Medicine LCC:Science LCC:Biology (General) |
| مصطلحات موضوعية: | motor primitives, trial-to-trial variability, locomotor development, muscle synergies, modularity, infancy, Medicine, Science, Biology (General), QH301-705.5 |
| الوصف: | Motor variability is a fundamental feature of developing systems allowing motor exploration and learning. In human infants, leg movements involve a small number of basic coordination patterns called locomotor primitives, but whether and when motor variability could emerge from these primitives remains unknown. Here we longitudinally followed 18 infants on 2–3 time points between birth (~4 days old) and walking onset (~14 months old) and recorded the activity of their leg muscles during locomotor or rhythmic movements. Using unsupervised machine learning, we show that the structure of trial-to-trial variability changes during early development. In the neonatal period, infants own a minimal number of motor primitives but generate a maximal motor variability across trials thanks to variable activations of these primitives. A few months later, toddlers generate significantly less variability despite the existence of more primitives due to more regularity within their activation. These results suggest that human neonates initiate motor exploration as soon as birth by variably activating a few basic locomotor primitives that later fraction and become more consistently activated by the motor system. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2050-084X |
| Relation: | https://elifesciences.org/articles/87463; https://doaj.org/toc/2050-084X |
| DOI: | 10.7554/eLife.87463 |
| URL الوصول: | https://doaj.org/article/897825b3643d462c8bba7c5aaa07db08 |
| رقم الأكسشن: | edsdoj.897825b3643d462c8bba7c5aaa07db08 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 2050084X |
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| DOI: | 10.7554/eLife.87463 |