Practice-dependent modulation of neural activity during human sensorimotor coordination: a functional Magnetic...

Area of Science:

• Neuroscience
• Motor Control
• Cognitive Psychology

Background:

• Motor coordination involves complex neural networks.
• Auditory-motor synchronization and syncopation are distinct coordination patterns.
• Practice effects on neural activity during these tasks are not fully understood.

Purpose of the Study:

• To investigate how practice affects brain activity patterns (BOLD) during syncopated versus synchronized auditory-motor coordination.
• To compare neural activation before and after a practice period focused on syncopation.

Main Methods:

• Functional Magnetic Resonance Imaging (fMRI) to measure blood oxygen level dependent (BOLD) activity.
• Eight subjects performed syncopation and synchronization tasks with an auditory metronome.
• Subjects underwent four practice sessions of syncopation before post-practice fMRI scans.

Main Results:

• Baseline syncopation engaged broader cortical and subcortical regions (SMA, putamen, thalamus, STG, vermis) than synchronization.
• Post-practice syncopation showed reduced activation in STG and vermis.
• Post-practice synchronization unexpectedly increased activation in SMA, IFG, and STG.

Conclusions:

• Practice with syncopation led to decreased neural activity during syncopation but increased activity during synchronization.
• Observed neural changes appear to be context- and history-dependent, not solely due to behavioral learning.
• Motor practice can induce differential neural plasticity in related but distinct motor tasks.