Gravity highlights a dual role of the insula in internal models
Rousseau, C.; Barbiero, M.; Pozzo, T.; Papaxanthis, C.; White, O.
Show abstract
Movements rely on a mixture of predictive and reactive mechanisms. With experience, the brain builds internal representations of actions in different contexts. Many factors are taken into account in this process among which the immutable presence of gravity. Any displacement of a massive body in the gravitational field generates forces and torques that must be predicted and compensated by appropriate motor commands. Studies have shown that the insular cortex is a key brain area for graviception. However, none attempted to address whether the same internal representation of gravity is shared between reactive and predictive mechanisms. Here, participants either mentally simulated (only predictive) or performed (predictive and reactive) vertical movements of the hand. We found that the posterior part of the insular cortex was engaged when feedback was processed. The anterior insula, however, was activated only in mental simulation of the action. A psychophysical experiment shows participants ability to integrate the effects of gravity. Our results demonstrate a dual internal representation of gravity within the insula and discuss how they can conceptually be linked.
Matching journals
The top 7 journals account for 50% of the predicted probability mass.
Similar papers in this journal
Similar papers in this journal
Similar papers in this journal
- Pupil dilation scales with movement distance of real but not of imagined reaching movements 96%
- Changes in Muscle Synergy Structure and Activation Patterns Underlie Force Field Adaptation, Retention, and Generalization 95%
- Task space exploration improves adaptation after incompatible virtual surgeries 95%
Similar papers in this journal
Similar papers in this journal
- Information processing in the Hand Laterality Judgement Task: Fundamental differences between dorsal and palmar views revealed by a Forced Response paradigm 96%
- EEG frequency tagging reveals the integration of dissimilar observed actions 95%
- Frontal-midline theta and posterior alpha oscillations index early processing of spatial representations during active navigation 94%
"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.