Visuo-proprioceptive recalibration and the sensorimotor map

Area of Science:

• Neuroscience
• Motor Control
• Perception

Background:

• Accurate hand movement relies on spatial perception.
• It is debated whether perception and action share a common sensorimotor map or use separate representations.
• Previous research suggests separate body representations for perception and action.

Purpose of the Study:

• To investigate if perceptual recalibration of hand position influences the sensorimotor map used for reach planning.
• To determine if changes in perceived hand position affect motor control.

Main Methods:

• Participants performed a target-directed reaching task using a robotic manipulandum.
• A Mismatch group experienced visual-proprioceptive cue conflict, inducing recalibration of perceived hand position.
• A Veridical group experienced aligned cues; their reaching was assessed before and after perceptual calibration tasks.

Main Results:

• The Mismatch group exhibited significantly shorter reaches post-recalibration, aligning with altered hand perception.
• Reaching performance in the Mismatch group returned to baseline within approximately 10 reaches.
• The Veridical group showed no significant changes in reach distance.

Conclusions:

• Perceptual recalibration appears to influence the sensorimotor map used for planning reaches.
• The effect of perceptual recalibration on reach planning may be transient.
• This suggests a dynamic interaction between perception and action planning.