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Updated: May 28, 2026
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Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
Published on: June 29, 2018
Theta oscillations reflect a putative neural mechanism for human sensorimotor integration
Leanna C Cruikshank1, Anthony Singhal, Mark Hueppelsheuser
1Center for Neuroscience, Univ. of Alberta, 5005-A Katz Group-Rexall Center, Edmonton, AB, Canada T6G 2E1. leannac@ualberta.ca
Journal of Neurophysiology
|October 7, 2011
Summary
Cortical theta and mu rhythms in humans are involved in sensorimotor integration. Theta oscillations increase during movement, while mu rhythm desynchronization is movement-specific, supporting their roles in sensorimotor networks.
Area of Science:
- Neuroscience
- Human sensorimotor integration
- Brain oscillations
Background:
- Hippocampal theta oscillations (3-12 Hz) are implicated in sensorimotor integration in rats.
- The role of cortical theta activity in human sensorimotor integration remains unclear.
- Mu rhythm (8-12 Hz) typically desynchronizes during human movement.
Purpose of the Study:
- To investigate whether human cortical theta activity underlies sensorimotor integration.
- To examine the relationship between theta and mu rhythms and sensorimotor processing.
- To test if theta activity reflects changes in the sensorimotor network, particularly the ventral visuomotor stream.
Main Methods:
- Measured electroencephalography (EEG) oscillatory activity during an instructed delayed reaching paradigm.
- Compared EEG activity across two conditions designed to differentially engage the ventral visuomotor stream.
- Analyzed theta (3-12 Hz) and mu (8-12 Hz) rhythm activity during stillness, movement initiation, and execution.
Main Results:
- Theta oscillations were more prevalent during movement initiation and execution compared to stillness.
- Theta activity was greater at temporal sites in condition 2 versus condition 1 during response initiation.
- Mu rhythm desynchronization was more pronounced in condition 2 than condition 1, indicating specificity to the sensorimotor network.
Conclusions:
- Cortical theta synchronization and mu desynchronization appear to be relevant to human sensorimotor integration.
- These rhythmic activities may represent broadly applicable neural mechanisms for sensorimotor processing.
- Findings suggest theta activity is part of the sensorimotor network, particularly when engaging ventral stream mechanisms.
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