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The Nature of Unintentional Movements| old_uid | 11784 |
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| title | The Nature of Unintentional Movements |
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| start_date | 2016/05/31 |
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| schedule | 11h |
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| online | no |
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| location_info | salle de réunion 304 |
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| summary | I am going to assume that voluntary movements are produced by the central nervous system via changes in referent coordinates (RC) for salient variables, while performance variables emerge given the external forces. Involuntary movements happen when external forces change without changes in RC. Recent experiments have shown that there is a third class of movements, voluntary unintentional movements produced by RC drifts. We assume that these drifts reflect natural relaxation processes in the system involved in movement production. I plan to review a series of recent experiments demonstrating unintentional movements seen when the subject is trying not to change a state or a trajectory of an effector. Such movements can be slow (with typical times of 10-15 s) or fast (with typical times of about 1 s). The results are interpreted assuming a mechanism, addressed as RC-back-coupling, which can be viewed as a reflection of the natural property of physical systems to move toward states with low potential energy. These results and theoretical developments represent a step towards developing a physical approach to motor control. |
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| responsibles | Baumard |
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