Abstract
Adaptation to delays between actions and sensory feedback is important for efficiently interacting with our environment. Adaptation may rely on predictions of action-feedback pairing (motor-sensory component), or predictions of tactile-proprioceptive sensation from the action and sensory feedback of the action (inter-sensory component). Reliability of temporal information might differ across sensory feedback modalities (e.g. auditory or visual), which in turn influences adaptation. Here, we investigated the role of motor-sensory and inter-sensory components on sensorimotor temporal recalibration for motor-auditory (button press-tone) and motor-visual (button press-Gabor patch) events. In the adaptation phase of the experiment, action-feedback pairs were presented with systematic temporal delays (0 ms or 150 ms). In the subsequent test phase, audio/visual feedback of the action were presented with variable delays. The participants were then asked whether they detected a delay. To disentangle motor-sensory from inter-sensory component, we varied movements (active button press or passive depression of button) at adaptation and test. Our results suggest that motor-auditory recalibration is mainly driven by the motor-sensory component, whereas motor-visual recalibration is mainly driven by the inter-sensory component. Recalibration transferred from vision to audition, but not from audition to vision. These results indicate that motor-sensory and inter-sensory components contribute to recalibration in a modality-dependent manner.
Highlights
Adaptation to delays between actions and sensory feedback is important for efficiently interacting with our environment
We presented participants with systematic delays between button presses and sensory feedback, and tested whether detection of variable delays inserted between action-feedback events changed after adaptation
Our results indicate that the motor-sensory component contributes more to the temporal recalibration of motor-auditory events than the inter-sensory component, while the inter-sensory component contributes more to the temporal recalibration of motor-visual events than the motor-sensory component
Summary
Adaptation to delays between actions and sensory feedback is important for efficiently interacting with our environment. We investigated the role of motor-sensory and inter-sensory components on sensorimotor temporal recalibration for motor-auditory (button press-tone) and motor-visual (button press-Gabor patch) events. Other studies investigating the relative contributions of motor-sensory and inter-sensory components on adaptation aimed to disentangle predictions based on efference copy from reafferent feedback, and test which component accounts mostly for recalibration effects. By manipulating the time between the intention to act and the auditory feedback of the action, the authors were able to investigate whether the intention to act or the sensation of having acted drives sensorimotor temporal recalibration They found that the temporal relationship between tactile signals associated with completion of the action and the auditory feedback of the action determines recalibration rather than the action itself, highlighting the role of the inter-sensory component over the motor-sensory component
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