Feedback-driven adaptation of gravity-related sensorimotor control to an upside-down postureuse asterix (*) to get italics

Denis Barbusse, Sarah Amoura, Jérémie Gaveau, Olivier WhitePlease use the format "First name initials family name" as in "Marie S. Curie, Niels H. D. Bohr, Albert Einstein, John R. R. Tolkien, Donna T. Strickland"

2024

<p>The ability to move is a vital and essential feature of human existence. &nbsp;We are experts at producing a variety of movements and have refined their control through evolution. As gravity is a major feature of our every-day environment, we have learned to take advantage of it by optimising its effects to minimise the cost of our actions. This can be illustrated by systematic differences in the temporal organisation of our movements according to their direction. Studying motor control in the face of various gravitational level modifications (hypergravity, hypogravity or weightlessness), the scientific literature has shown that movement kinematics are rapidly adapted to new gravitational conditions. Hitherto, most researchers varied gravitational intensity to probe its neural integration into sensorimotor control. Here, we investigated the effects of a reversal of gravitational direction in the egocentric reference frame. Our results reveal a major effect of body-orientation reversal on motor control. This effect then progressively disappears, such that arm kinematics reached values that were close to the known baseline optimal ones. These results reveal that the effects of a simple reversal of body orientation cannot be fully anticipated to produce arm movements. Furthermore, comparing the evolution of varied parameters that were collected at different time points during each movement, our results reveal that adaptation first occured during the late movement phases; i.e., around the time to peak velocity and time to peak deceleration. These results suggest an adaptation through feedback mechanisms whilst feedforward ones would first remain unmodified.</p>

https://osf.io/6tys4You should fill this box only if you chose 'All or part of the results presented in this preprint are based on data'. URL must start with http:// or https://

https://osf.io/z65mqYou should fill this box only if you chose 'Scripts were used to obtain or analyze the results'. URL must start with http:// or https://

https://osf.io/z65mqYou should fill this box only if you chose 'Codes have been used in this study'. URL must start with http:// or https://

Motor Control, Motor Optimisation, Kinematic, Graviception

NonePlease indicate the methods that may require specialised expertise during the peer review process (use a comma to separate various required expertises).

Biomechanics, Sensorimotor Control

Frederic Crevecoeur, Jean-Louis Thonnard, Joseph McIntyre, Jan M. Hondzinski, Sara A. Winges, Frederic Crevecoeur [frederic.crevecoeur@uclouvain.be] suggested: Conflict of interest: we published paper together less than four years ago., Michel Guerraz [michel.guerraz@univ-smb.fr] suggested: Jean Pierre Bresiani , Michel Guerraz [michel.guerraz@univ-smb.fr] suggested: https://www.unifr.ch/med/fr/research/group/bresciani/, Jean-Pierre Bresciani suggested: Dr Jean Blouin, jean.blouin@univ-amu.fr , Jean-Pierre Bresciani suggested: Dr Fabrice Sarlegna, fabrice.sarlegna@univ-amu.fr , Jean-Pierre Bresciani suggested: Pr Michel Guerraz, michel.guerraz@univ-smb.fr

e.g. John Doe john@doe.com

No need for them to be recommenders of PCI Health & Mov Sci. Please do not suggest reviewers for whom there might be a conflict of interest. Reviewers are not allowed to review preprints written by close colleagues (with whom they have published in the last four years, with whom they have received joint funding in the last four years, or with whom they are currently writing a manuscript, or submitting a grant proposal), or by family members, friends, or anyone for whom bias might affect the nature of the review - see the code of conduct

2023-12-14 11:47:30

Anne Koelewijn

Anonymous, Anonymous