Visuomotor Adaptation and Sensory Recalibration in Reversed Hand Movement Task


Visuomotor adaptation is critical in motor planning and execution, but the effects of decoupling visual and proprioceptive feedback are unclear. The present study asked participants to reach toward targets in virtual reality (VR). Arm movements in VR were either consistent with the real world or reflected in the left-right and vertical axes. Participants completed two consistent experimental sessions, with a reflected motion session in between. While reaction time in the reflected motion session was slower than in the normal motion session, participants demonstrated a learning improvement in the second consistent motion session. This improvement correlated with more linear trajectories in the reversed and second normal motion sessions, which could be due to increased attention to visual feedback. Participants fell into one of two clusters depending on their preference for proximal/distal or awkward/smooth movements in the reversed session. Participants who preferred distal-smooth produced more linear trajectories than those who preferred proximal-awkward.

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