Performing Isometric Force Control in Combination with a Cognitive Task : A Multidimensional Assessment

Jean-Jacques Temprado (1) , Solveig Vieluf (1) , Nicolas Bricot (1) , Eric Berton (1) , Rita Sleimen-Malkoun (1, 2)

1 ISM - Institut des Sciences du Mouvement Etienne Jules Marey
2 INS - Institut de Neurosciences des Systèmes

Introduction We used a multidimensional approach to study isometric force control in single and dual-task conditions. Methods Multiple measures of performance, efficiency, variability, and structural interference were calculated at low and higher force levels under single (force maintenance) and dual-task (force maintenance and reaction time) conditions. Results Reaction time and signal-to-noise ratio were larger in the dual-task conditions. They were also greater for the higher force condition, while sample entropy was lower. Perturbation analyses revealed smaller relative amplitude of downward perturbations for the higher force level. Discussion Attentional effort and efficiency are positively related when force level increases, and inversely related to entropy. These relations were presumably mediated by attentional investment. Behavioral perturbations show that attentional resources and structural interference models are not mutually exclusive to account for dual-task situation. Overall, the present study highlights the interest of a multidimensional assessment of force control.

Mots clés: Reaction time; Signal to noise ratio; Entropy; Relaxation (physics); Control systems; Relaxation time; Attention; Postural control

Domaines: Neurosciences; Biotechnologies

Jean-Jacques Temprado, Solveig Vieluf, Nicolas Bricot, Eric Berton, Rita Sleimen-Malkoun. Performing Isometric Force Control in Combination with a Cognitive Task : A Multidimensional Assessment. PLoS ONE, 2015, 10 (11), ⟨10.1371/journal.pone.0142627⟩. ⟨hal-01414087⟩