Human Sensorimotor Cortex Reactivates Recent Visuomotor Experience during Awake Rest.

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Motor Control

Background:

• Task-related neural activity patterns can re-emerge during rest, aiding memory consolidation and learning.
• The primary sensorimotor cortex is crucial for motor control and learning.

Purpose of the Study:

• To investigate if task-related neural reactivation occurs in the primary sensorimotor cortex after a visuomotor task.
• To determine the relationship between this reactivation and motor performance improvement.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to scan 42 participants performing a visuomotor tracking task with perturbations.
• A multivariate pattern classifier analyzed brain activity during task and control blocks, and resting-state scans before and after the task.
• Representational similarity analysis assessed pattern similarity between task and rest periods.

Main Results:

• A significant increase in task-related activity was observed during post-task rest compared to pre-task rest.
• This reactivation was specific to the left primary sensorimotor cortex contralateral to the hand used for the task.
• The degree of reactivation positively correlated with motor skill improvement observed after the rest period.

Conclusions:

• Recent visuomotor task experiences are reactivated in the primary sensorimotor cortex during subsequent rest.
• This neural reactivation plays a role in motor learning and skill enhancement following task engagement.