Alpha- and theta-range cortical synchronization and corticomuscular coherence during joystick manipulation in a
Satoshi Hori1, Jumpei Matsumoto, Etsuro Hori
1System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani 2630, Toyama, 930-0194, Japan.
Brain Topography
|July 2, 2013
Summary
Spatial navigation learning enhances brain-muscle synchronization. Increased alpha and theta band activity and coherence between brain regions and muscles facilitate motor command conversion during navigation tasks.
Area of Science:
- Neuroscience
- Cognitive Science
- Motor Control
Background:
- Spatial navigation involves multiple brain regions, but the conversion to motor commands is not fully understood.
- Synchronization across brain regions and between cortex and muscles is hypothesized to integrate neural activity for cognitive functions and motor output.
Purpose of the Study:
- To investigate neural synchronization during spatial navigation.
- To examine the relationship between brain activity and motor commands during learning.
Main Methods:
- Subjects performed a virtual town navigation task with a joystick.
- Electroencephalograms (EEG) and electromyograms (EMG) of the right arm were recorded during three trials.
- Analysis focused on changes in power, corticocortical coherence, and corticomuscular coherence.
Main Results:
- Task performance improved with repeated trials (less time in trial 3 vs. trial 1).
- Learning was associated with increased alpha power (sensorimotor cortex) and theta power (premotor, frontotemporal regions).
- Alpha and theta corticocortical and corticomuscular coherence significantly increased with learning.
Conclusions:
- Synchronous alpha and theta activity is crucial for integrating brain activity during spatial navigation.
- This synchronization facilitates the conversion of cognitive processes into effective motor commands for navigation.
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