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Practice-dependent modulation of neural activity during human sensorimotor coordination: a functional Magnetic
K J Jantzen1, F L Steinberg, J A S Kelso
1Center for Complex Systems and Brain Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA. jantzen@walt.ccs.fau.edu
Neuroscience Letters
|October 26, 2002
Summary
Practice alters brain activity patterns during auditory-motor synchronization and syncopation. While syncopation showed reduced brain activation after practice, synchronization unexpectedly increased it, suggesting context-dependent neural changes.
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.