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Generalization of sensorimotor adaptation across different effectors and conditions| old_uid | 11614 |
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| title | Generalization of sensorimotor adaptation across different effectors and conditions |
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| start_date | 2012/07/12 |
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| schedule | 14h |
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| online | no |
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| details | Invité par Fabrice Sarlegna, Equipe Comportements Perceptivo-Moteurs. |
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| summary | The fact that motor learning generalizes across different motor effectors (e.g., from dominant to nondominant arm) and movement conditions (e.g., from bilateral to unilateral movements) is an implicit basis of training protocols in many rehabilitation and sports settings. We investigated transfer of visuomotor and dynamic adaptations across the limbs in a series of studies (e.g., Sainburg and Wang 2002 ; Wang and Sainburg 2004 ; Wang 2008 ; Stoeckel and Wang 2011 ; Wang et al. 2011), which indicate that the pattern of interlimb transfer depends on a number of factors such as the sensorimotor nature of given tasks, movement parameters in question, workspace locations and perception of the tasks, but not on the individual’s awareness of sensorimotor perturbations. We also investigated transfer of visuomotor and dynamic adaptations between bilateral and unilateral movement conditions (Wang and Sainburg 2009 ; Wang et al. 2010 ; Wang et al. in review), which indicate a substantial overlap between the neural processes underlying bilateral and unilateral motor learning conditions. Collectively, our findings demonstrate that sensorimotor adaptation can generalize across movement conditions independently of the limbs used, although the extent of generalization is substantially greater when the same limbs are used in the given conditions. This suggests that the combination of algorithm-based (or model-based) learning, which occurs independently of motor effectors, and instance-based (or model-free) learning, which is effector specific, leads to optimal generalization of motor learning.
References : Sainburg RL, Wang J (2002) Interlimb transfer of visuomotor rotations : Independence of direction and final position information. Experimental Brain Research 145 : 437-447 Wang J, Sainburg RL. (2004) Interlimb transfer of novel inertial dynamics is asymmetrical. Journal of Neurophysiology. 92 : 349-60 Wang J. (2008) A dissociation between visual and motor workspace inhibits generalization of visuomotor adaptation across the limbs. Experimental Brain Research 187:483-90 Wang J, Sainburg RL. (2009) Generalization of visuomotor learning between bilateral and unilateral conditions. Journal of Neurophysiology 102:2790-9. Wang J, Mordkoff JT, Sainburg RL. (2010) Visuomotor learning generalizes between bilateral and unilateral conditions despite varying degrees of bilateral interference. Journal of Neurophysiology 104:2713-21. Stoeckel T, Wang J. (2011) Transfer of short-term motor learning across the lower limbs as a function of task conception and practice order. Brain and Cognition 77:271-9. Wang J, Joshi M, Lei Y. (2011) The extent of interlimb transfer following adaptation to a novel visuomotor condition does not depend on awareness of the condition. Journal of Neurophysiology 106:259-64. Wang J, Lei Y, Xiong K, Marek K. (in review) Complete generalization of sensorimotor learning from bilateral to unilateral movement conditions. Submitted to Journal of Neurophysiology. |
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| responsibles | Fenouil |
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