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    Université de Fribourg

    Alterations in the cortical control of standing posture during varying levels of postural threat and task difficulty

    Tokuno, Craig D. ; Keller, Martin ; Carpenter, Mark G. ; Márquez, Gonzalo ; Taube, Wolfgang

    In: Journal of Neurophysiology, 2018, vol. 120, no. 3, p. 1010–1016

    Cortical excitability increases during the performance of more difficult postural tasks. However, it is possible that changes in postural threat associated with more difficult tasks may in themselves lead to alterations in the neural strategies underlying postural control. Therefore, the purpose of this study was to examine whether changes in postural threat are responsible for the...

    Université de Fribourg

    Preparatory cortical and spinal settings to counteract anticipated and non-anticipated perturbations

    Wächli, Michael ; Tokuno, Craig D. ; Ruffieux, Jan ; Keller, Martin ; Taube, Wolfgang

    In: Neuroscience, 2017, vol. 365, no. Supplement C, p. 12–22

    Little is known about how the central nervous system prepares postural responses differently in anticipated compared to non-anticipated perturbations. To investigate this, participants were exposed to translational and rotational perturbations presented in a blocked (anticipated) and a random (non-anticipated) design. The preparatory setting (‘central set’) was measured by H-reflexes,...