DANION Frederic

Nom : DANION
Prénom : Frederic
Téléphone : 04 91 32 40 20
Fonction : Chercheur
Grade : CRCN
Bureau : 3.04

Présentation

Grasping object is a very common task in daily life, but also in resarch laboratories whose goal is to understand how the brain controls the movement. Although a lot of effort has been consented for understanding how the brain controls the trajectory of hand and fingers when approaching an object, less effort has been consented to understand how the brain controls the force of our fingers following the contact with the object. Still, appropriate grip force is necessary for efficient object manipulation. Too much force and the object can (potentially) be crushed, not enough force and the object will slip away from our hand. The goal of my research is to understand the mechanisms underlying the control of grip force.

Numerous studies have shown that grip force is controlled in a predictive manner when we manipulate an object. This conclusion is drawn from the comparison between the timing of grip force and load force (i.e. the force that tends to make the object slip). In our lab, we often asked subjects to move an object whose displacement is constrained by an elastic cord (see below). In this situation, the load force corresponds to the tension created by the elastic cord. In those conditions, the mimimal grip force necessary to prevent the object from slipping changes as function of the current position of the object. Experimental data show that grip force and load force change in parallel, with grip force preceding slightly load force (by about 20 ms). This anticipatory modulation of grip force is taken as an evidence that the brain predicts the outcome of our movement (i.e. the resulting load force). In our lab, we constantly invent and test new experimental situations that help to circumvent the capabilities (and failures) of this predictive control.

Publications



  • Canaveral C.A., Danion F., Berrigan F., et Bernier P.-M. (2017). Variance in exposed perturbations impairs retention of visuomotor adaptation. Journal of Neurophysiology, 118: 2745-2754.


  • Danion F.R. et Flanagan J.R. (2018). Different gaze strategies during eye versus hand tracking of a moving target. Scientific Reports, 8.

  • Danion F., Bongers R.M., et Bootsma R.J. (2014). The trade-off between spatial and temporal variabilities in reciprocal upper-limb aiming movements of different durations. PloS One, 9.


  • Danion F. (2013). Superposition of Automatic and Voluntary Aspects of Grip Force Control in Humans during Object Manipulation. PLoS ONE, 8.


  • Danion F., Mathew J., et Flanagan J.R. (2017). Eye Tracking of Occluded Self-Moved Targets: Role of Haptic Feedback and Hand-Target Dynamics. eneuro, 4: ENEURO.0101-17.2017.


  • Gouirand N., Mathew J., Brenner E., et Danion F.R. (2019). Eye movements do not play an important role in the adaptation of hand tracking to a visuomotor rotation. Journal of Neurophysiology, 121: 1967-1976.


  • Landelle C., Montagnini A., Madelain L., et Danion F. (2016). Eye tracking a self-moved target with complex hand-target dynamics. Journal of Neurophysiology, 116: 1859-1870.


  • Mathew J., Bernier P.-M., et Danion F.R. (2018). Asymmetrical Relationship between Prediction and Control during Visuomotor Adaptation. eneuro, 5: ENEURO.0280-18.2018.


  • Mathew J. et Danion F.R. (2018). Ups and downs in catch-up saccades following single-pulse TMS-methodological considerations. PLOS ONE, 13: e0205208.


  • Mathew J., Eusebio A., et Danion F. (2017). Limited Contribution of Primary Motor Cortex in Eye-Hand Coordination: A TMS Study. The Journal of Neuroscience, 37: 9730-9740.


  • Mathew J., Sarlegna F.R., Bernier P.-M., et Danion F.R. (2019). Handedness Matters for Motor Control But Not for Prediction. eneuro, 6: ENEURO.0136-19.2019.
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