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• W2110053085 abstract "Corticospinal drive has been shown to contribute significantly to the control of walking in adult human subjects. It is unknown to what extent functional change in this drive is important for maturation of gait in children. In adults, populations of motor units within a muscle show synchronized discharges during walking with pronounced coherence in the 15–50 Hz frequency band. This coherence has been shown to depend on cortical drive. Here, we investigated how this coherence changes with development. Forty-four healthy children aged 4–15 years participated in the study. Electromyographic activity (EMG) was recorded from pairs of electrodes placed over the right tibialis anterior (TA) muscle during static dorsiflexion and during walking on a treadmill (speed from 1.8 to 4.8 km h−1). A significant increase of coherence with increasing age was found in the 30–45 Hz frequency band (gamma) during walking and during static ankle dorsiflexion. A significant correlation with age was also found in the 15–25 Hz frequency band (beta) during static foot dorsiflexion. χ2 analysis of differences of coherence between different age groups of children (4–6, 7–9, 10–12 and 13–15 years of age) revealed a significantly lower coherence in the gamma band for recordings during walking in children aged 4–6 years as compared to older children. Recordings during static dorsiflexion revealed significant differences in both the beta and gamma bands for children in the 4–6 and 7–9 years age groups as compared to the older age groups. A significant age-related decrease in step-to-step variability of toe position during the swing phase of walking was observed. This reduction in the step-to-step variability of gait was correlated with increased gamma band coherence during walking. We argue that this may reflect an increased ability to precisely control the ankle joint position with age, which may be contingent on maturation of corticospinal control of the foot dorsiflexor muscles." @default.
• W2110053085 created "2016-06-24" @default.
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• W2110053085 date "2010-11-15" @default.
• W2110053085 modified "2023-09-29" @default.
• W2110053085 title "Childhood development of common drive to a human leg muscle during ankle dorsiflexion and gait" @default.
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• W2110053085 doi "https://doi.org/10.1113/jphysiol.2010.195735" @default.
• W2110053085 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3008846" @default.
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