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Université de Fribourg

Bioceramic fabrics improve quiet standing posture and handstand stability in expert gymnasts

Ciana, C. ; Gianocca, V. ; Barraud, P.A. ; Guerraz, M. ; Bresciani, Jean-Pierre

In: Gait & Posture, 2015, vol. 42, no. 4, p. 419–423

Bioceramic fabrics have been claimed to improve blood circulation, thermoregulation and muscle relaxation, thereby also improving muscular activity. Here we tested whether bioceramic fabrics have an effect on postural control and contribute to improve postural stability. In Experiment 1, we tested whether bioceramic fabrics contribute to reduce body-sway when maintaining standard standing...

Université de Fribourg

Quand la culture scolaire tend à structurer la négociation des rôles d’enseignant et de parent d’élève

Conus, Xavier ; Nunez Moscoso, Javier

In: La Recherche en Éducation, 2015, no. 14, p. 8-22

In a socio-political context more and more characterised by a call for collaboration, even for partnership between school and families, this article aims to investigate empirically the negotiation process of roles of teacher and parent of a pupil at the very beginning of their relationship, when the child starts school. Hence, we are conducting an ethnographic study in one Swiss school...

Università della Svizzera italiana

TagNet : a scalable tag-based information-centric network

Papalini, Michele ; Carzaniga, Antonio (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2015 ; 2015INFO012.

The Internet has changed dramatically since the time it was created. What was originally a system to connect relatively few remote users to mainframe computers, has now become a global network of billions of diverse devices, serving a large user population, more and more characterized by wireless communication, user mobility, and large-scale, content-rich, multi-user applications that are...

Université de Fribourg

Task-dependent changes of corticospinal excitability during observation and motor imagery of balance tasks

Mouthon, Audrey ; Ruffieux, Jean ; Wälchli, Michael ; Keller, Martin ; Taube, Wolfgang

In: Neuroscience, 2015, vol. 303, p. 535–543

Non-physical balance training has demonstrated to be efficient to improve postural control in young people. However, little is known about the potential to increase corticospinal excitability by mental simulation in lower leg muscles. Mental simulation of isolated, voluntary contractions of limb muscles increase corticospinal excitability but more automated tasks like walking seem to have no or...

Université de Fribourg

Neck muscle vibration can improve sensorimotor function in patients with neck pain

Beinert, Konstantin ; Keller, b , Martin ; Taube, Wolfgang

In: The Spine Journal, 2015, vol. 15, no. 3, p. 514–521

Background: context People with neck pain display a diminished joint position sense and disturbed postural control, which is thought to be a result of impaired somatosensory afferent activity and/or integration. Afferent processing can be artificially manipulated by vibration and was shown to reduce motor performance in healthy subjects. However, the effect of vibration on sensorimotor function...

Université de Fribourg

Brain activity during observation and motor imagery of different balance tasks: An fMRI study

Taube, Wolfgang ; Mouthon, Michael ; Leukel, Christian ; Hoogewoud, Henri-Marcel ; Annoni, Jean-Marie ; Keller, Martin

In: Cortex, 2015, vol. 64, p. 102–114

After immobilization, patients show impaired postural control and increased risk of falling. Therefore, loss of balance control should already be counteracted during immobilization. Previously, studies have demonstrated that both motor imagery (MI) and action observation (AO) can improve motor performance. The current study elaborated how the brain is activated during imagination and observation...

Université de Fribourg

Human short-term spatial memory: Precision predicts capacity

Lavenex, Pamela Banta ; Boujon, , Valérie ; Ndarugendamwo, Angélique ; Lavenex, Pierre

In: Cognitive Psychology, 2015, vol. 77, p. 1–19

Here, we aimed to determine the capacity of human short-term memory for allocentric spatial information in a real-world setting. Young adults were tested on their ability to learn, on a trial-unique basis, and remember over a 1-min interval the location(s) of 1, 3, 5, or 7 illuminating pads, among 23 pads distributed in a 4 m × 4 m arena surrounded by curtains on three sides. Participants had to...

Université de Fribourg

Non-physical practice improves task performance in an unstable, perturbed environment: motor imagery and observational balance training

Taube, Wolfgang ; Lorch, Michael ; Zeiter, Sibylle ; Keller, Martin

In: Frontiers in Human Neuroscience, 2014, vol. 8, p. 972

For consciously performed motor tasks executed in a defined and constant way, both motor imagery (MI) and action observation (AO) have been shown to promote motor learning. It is not known whether these forms of non-physical training also improve motor actions when these actions have to be variably applied in an unstable and unpredictable environment. The present study therefore investigated the...