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Updated: Jul 1, 2025
09:35
Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG
Published on: March 10, 2017
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The direction of theta and alpha travelling waves modulates human memory processing
Uma R Mohan1, Honghui Zhang2, Bard Ermentrout3
1Surgical Neurology Branch, NINDS, National Institutes of Health, Bethesda, MD, USA.
Nature Human Behaviour
|March 8, 2024
Summary
Brain waves called travelling waves coordinate neural activity. These waves move in different directions during memory encoding and recall, showing their role in flexible brain coordination for behavior.
Area of Science:
- Neuroscience
- Cognitive Science
- Brain Dynamics
Background:
- The brain coordinates widespread neural activity for complex behaviors.
- Travelling waves of neural oscillations are a proposed mechanism for this coordination.
- The functional role of travelling waves in humans remained largely unknown.
Purpose of the Study:
- To investigate the functional role of travelling waves in human cortical activity.
- To determine if travelling wave directionality correlates with specific cognitive processes.
Main Methods:
- Utilized rare direct human brain recordings.
- Analyzed theta- and alpha-band (2-13 Hz) oscillations.
- Examined travelling wave propagation direction during cognitive tasks.
Main Results:
- Travelling waves propagated differently during distinct cognitive processes.
- Posterior-to-anterior propagation observed during successful memory encoding.
- Anterior-to-posterior propagation observed during memory recall.
- Travelling wave directionality correlated with local neuronal spiking patterns.
Conclusions:
- Travelling waves play a distinct functional role in the human cortex.
- Directionality of travelling waves dynamically coordinates neural connectivity.
- These findings suggest travelling waves are fundamental for flexible cognitive and behavioral support.
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