Direction-dependent arm kinematics reveal optimal integration of gravity cues
The brain has evolved an internal model of gravity to cope with life in the Earth's gravitational environment. How this internal model benefits the implementation of skilled movement has remained unsolved. One prevailing theory has assumed that this internal model is used to compensate for grav...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
eLife Sciences Publications Ltd
2016-11-01
|
| Series: | eLife |
| Subjects: | |
| Online Access: | https://elifesciences.org/articles/16394 |
| _version_ | 1828165962515349504 |
|---|---|
| author | Jeremie Gaveau Bastien Berret Dora E Angelaki Charalambos Papaxanthis |
| author_facet | Jeremie Gaveau Bastien Berret Dora E Angelaki Charalambos Papaxanthis |
| author_sort | Jeremie Gaveau |
| collection | DOAJ |
| description | The brain has evolved an internal model of gravity to cope with life in the Earth's gravitational environment. How this internal model benefits the implementation of skilled movement has remained unsolved. One prevailing theory has assumed that this internal model is used to compensate for gravity's mechanical effects on the body, such as to maintain invariant motor trajectories. Alternatively, gravity force could be used purposely and efficiently for the planning and execution of voluntary movements, thereby resulting in direction-depending kinematics. Here we experimentally interrogate these two hypotheses by measuring arm kinematics while varying movement direction in normal and zero-G gravity conditions. By comparing experimental results with model predictions, we show that the brain uses the internal model to implement control policies that take advantage of gravity to minimize movement effort. |
| first_indexed | 2024-04-12T01:53:43Z |
| format | Article |
| id | doaj.art-628c7b1d716e4555a62e6e2109f5893e |
| institution | Directory Open Access Journal |
| issn | 2050-084X |
| language | English |
| last_indexed | 2024-04-12T01:53:43Z |
| publishDate | 2016-11-01 |
| publisher | eLife Sciences Publications Ltd |
| record_format | Article |
| series | eLife |
| spelling | doaj.art-628c7b1d716e4555a62e6e2109f5893e2022-12-22T03:52:52ZengeLife Sciences Publications LtdeLife2050-084X2016-11-01510.7554/eLife.16394Direction-dependent arm kinematics reveal optimal integration of gravity cuesJeremie Gaveau0https://orcid.org/0000-0001-8827-1486Bastien Berret1Dora E Angelaki2https://orcid.org/0000-0002-9650-8962Charalambos Papaxanthis3Université Bourgogne Franche-Comté, INSERM CAPS UMR 1093, Dijon, FranceCIAMS, Université Paris-Sud, Université Paris Saclay, Orsay, France; CIAMS, Université d'Orléans, Orléans, FranceDepartment of Neuroscience, Baylor College of Medicine, Houston, United StatesUniversité Bourgogne Franche-Comté, INSERM CAPS UMR 1093, Dijon, FranceThe brain has evolved an internal model of gravity to cope with life in the Earth's gravitational environment. How this internal model benefits the implementation of skilled movement has remained unsolved. One prevailing theory has assumed that this internal model is used to compensate for gravity's mechanical effects on the body, such as to maintain invariant motor trajectories. Alternatively, gravity force could be used purposely and efficiently for the planning and execution of voluntary movements, thereby resulting in direction-depending kinematics. Here we experimentally interrogate these two hypotheses by measuring arm kinematics while varying movement direction in normal and zero-G gravity conditions. By comparing experimental results with model predictions, we show that the brain uses the internal model to implement control policies that take advantage of gravity to minimize movement effort.https://elifesciences.org/articles/16394kinematicsoptimal controlmotor planningsensorimotor adaptationgravity |
| spellingShingle | Jeremie Gaveau Bastien Berret Dora E Angelaki Charalambos Papaxanthis Direction-dependent arm kinematics reveal optimal integration of gravity cues eLife kinematics optimal control motor planning sensorimotor adaptation gravity |
| title | Direction-dependent arm kinematics reveal optimal integration of gravity cues |
| title_full | Direction-dependent arm kinematics reveal optimal integration of gravity cues |
| title_fullStr | Direction-dependent arm kinematics reveal optimal integration of gravity cues |
| title_full_unstemmed | Direction-dependent arm kinematics reveal optimal integration of gravity cues |
| title_short | Direction-dependent arm kinematics reveal optimal integration of gravity cues |
| title_sort | direction dependent arm kinematics reveal optimal integration of gravity cues |
| topic | kinematics optimal control motor planning sensorimotor adaptation gravity |
| url | https://elifesciences.org/articles/16394 |
| work_keys_str_mv | AT jeremiegaveau directiondependentarmkinematicsrevealoptimalintegrationofgravitycues AT bastienberret directiondependentarmkinematicsrevealoptimalintegrationofgravitycues AT doraeangelaki directiondependentarmkinematicsrevealoptimalintegrationofgravitycues AT charalambospapaxanthis directiondependentarmkinematicsrevealoptimalintegrationofgravitycues |