Asymmetrical Relationship between Prediction and Control during Visuomotor Adaptation

Area of Science:

• Neuroscience
• Motor Control
• Human Movement Science

Background:

• Skilled motor behavior relies on body control and predicting sensory outcomes.
• Adaptation is necessary when motor-to-sensory mappings change.
• Current theories posit a joint update of control and prediction.

Purpose of the Study:

• To investigate the transfer of adaptation between motor control and prediction tasks.
• To challenge the view that control and prediction must update together.
• To explore how task demands influence the update of prediction and control.

Main Methods:

• Participants performed hand-tracking and eye-tracking tasks with altered visual feedback.
• Hand control was assessed via cursor-target distance.
• Eye prediction was assessed via eye-cursor distance.

Main Results:

• Adaptation in hand tracking significantly improved subsequent eye tracking.
• Adaptation in eye tracking did not transfer to hand tracking.
• A dissociation was observed, with prediction updating independently of control.

Conclusions:

• Prediction can be updated independently of motor control.
• Task demands mediate the update of prediction and control processes.
• Separate neural processes likely underlie prediction and control, allowing prediction learning without enhanced control.