Titre :	Fine adaptive control of precision grip without maximum pinch strength changes after mediannerve mobilization
Type de document :	document électronique
Auteurs :	Frédéric Dierick ; J.-M. Brismée ; Olivier White ; Anne-France Bouché ; Céline Perichon ; Nastasia Filoni ; Vincent Barvaux ; Fabien Buisseret
Année de publication :	2020
Note générale :	Cet article est une prépublication. doi: https://doi.org/10.1101/2020.04.01.2004963
Langues :	Anglais (eng)
Résumé :	Fine dexterity critically depends on information conveyed by the median nerve. While the effects of its compression andvibration are well characterized, little is known about longitudinal tension and excursion. Using a force-sensitive manipulandum,a numeric dynamometer and Semmes-Weinstein monofilaments, we examined the adaptations of precision grip control,maximum pinch strength and fingertips pressure sensation threshold before and immediately after the application of longitudinaltension and excursion mobilizations applied on the median nerve. Grip (GF) and load (LF) forces applied by the thumb,index and major fingers were collected in 40 healthy young participants during three different grip precision tasks along thedirection of gravity. For grip-lift-drop task, maximumGFandLFand their first time derivatives were computed. For up-downoscillations, means ofGFandLFand their variability were computed. For oscillations with up and down collisions, peaksofGFandLF, time delay betweenGFpeak and contact, and values ofGFandLFat contact were collected. Our findingsshow that median nerve mobilizations induce significant fine adaptations of precision grip control in the three different tasksbut mainly during grip-lift-drop and oscillations with collisions. Fingertips pressure sensation thresholds at index and thumbwere significantly reduced after the mobilizations. No significant changes were observed for maximum pinch strength. Weconclude that precision grip adaptations observed after median mobilizations could be partly explained by changes in cutaneousmedian-nerve mechanoreceptive afferents from the thumb and index fingertip
En ligne :	https://www.medrxiv.org/content/10.1101/2020.04.01.20049635v1.full.pdf
Permalink :	./index.php?lvl=notice_display&id=84498

Fine adaptive control of precision grip without maximum pinch strength changes after mediannerve mobilization [document électronique] / Frédéric Dierick ; J.-M. Brismée ; Olivier White ; Anne-France Bouché ; Céline Perichon ; Nastasia Filoni ; Vincent Barvaux ; Fabien Buisseret . - 2020.
Cet article est une prépublication.
doi: https://doi.org/10.1101/2020.04.01.2004963
Langues : Anglais (eng)

Résumé :	Fine dexterity critically depends on information conveyed by the median nerve. While the effects of its compression andvibration are well characterized, little is known about longitudinal tension and excursion. Using a force-sensitive manipulandum,a numeric dynamometer and Semmes-Weinstein monofilaments, we examined the adaptations of precision grip control,maximum pinch strength and fingertips pressure sensation threshold before and immediately after the application of longitudinaltension and excursion mobilizations applied on the median nerve. Grip (GF) and load (LF) forces applied by the thumb,index and major fingers were collected in 40 healthy young participants during three different grip precision tasks along thedirection of gravity. For grip-lift-drop task, maximumGFandLFand their first time derivatives were computed. For up-downoscillations, means ofGFandLFand their variability were computed. For oscillations with up and down collisions, peaksofGFandLF, time delay betweenGFpeak and contact, and values ofGFandLFat contact were collected. Our findingsshow that median nerve mobilizations induce significant fine adaptations of precision grip control in the three different tasksbut mainly during grip-lift-drop and oscillations with collisions. Fingertips pressure sensation thresholds at index and thumbwere significantly reduced after the mobilizations. No significant changes were observed for maximum pinch strength. Weconclude that precision grip adaptations observed after median mobilizations could be partly explained by changes in cutaneousmedian-nerve mechanoreceptive afferents from the thumb and index fingertip
En ligne :	https://www.medrxiv.org/content/10.1101/2020.04.01.20049635v1.full.pdf
Permalink :	./index.php?lvl=notice_display&id=84498